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18/4/2019 give any three precautionary measures considered to ensure the safety of computers in a computer laboratoryRead Now tHE KEYWORD HERE IS 'SAFETY'
Safety here means, a condition or a measure taken to protect computers from unlikely damage, risk, danger or burglary.
Computer Desk (picture courtesy of pinterest)
POSSIBLE PRECAUTIONARY MEASURES1. BURGLAR PROOFING
Physical access to the computer room should be restricted to ensure that only authorized persons get access to the computers.
To prevent unauthorized access to the computer room, the following controls should be implemented:
2. VENTILATION.
Both computers and human beings emit heat energy into the environment. Therefore, the computer room must have good circulation of air to avoid overheating and suffocation.
Proper ventilation enables the computers to cool, and therefore, avoids damaging the electronic parts. The following facilities can ensure proper ventilation in a room:
3. DUST CONTROL
The service should include; blowing dust from the System unit, cleaning the floppy drives, cleaning the Keyboard, cleaning the Monitor externally, and also cleaning all peripheral devices such as Printers and Mouse. 4. DUMP CONTROL.
Humidity in the computer laboratory must be regulated to remain at an optimum 50%. If the humidity is low, it allows static electricity to build up and causes damage to sensitive electronic components. Similarly, high humidity of over 70% causes rusting of the metallic parts of the computer system.
5. HANDLING OF MATERIALS & EQUIPMENT.
Computer devices must be handled with a lot of care as they are extremely fragile and can easily get damaged. Dropping or bumping can cause permanent damage on the device, e.g., to transport the System unit always handle it on its frame.
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1. inputThis is the ability for a computer to accept data either through input devices such as scanners, keyboards, mice and others or through information retrieved from storage devices. Input of data is a main function because all other functions depend on the incoming data for processing and output.  Functions of a Computer 2. processingProcessing and storage are sometimes broken down as separate basic functions of a computer. However, looking at this critical idea keenly, we notice that processing and storage are sometimes inseparable this is because processing devices rely heavily on storage devices vis a vis. Processing is an act where a computer converts raw meaningless piece of information called data into a more meaningful piece of information. This is normally done with a closer help of primary storage devices such as the RAM, and special types of memories such as the registers, buffers and cache memory. Processing is a main function of a computer because of the conversion, manipulation of numeric data and logical decisions. 3. OutputThis is an act for a computer to display the result of a processing activity. This can be done using output devices such as the monitor, printer, plotter, speakers etc.
The functions of a computer system cannot be complete without the output, simply because it gives a feedback of the result for the computer user to digest, change, amend, store or print.
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What is a laser printer?This is an electrostatic technology powered printer that uses a laser beam of light to create characters on a piece of paper.  Laser Printer How a laser printer works
RELATED LINKS ..Advantages of laser printers
Disadvantages of laser printers
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wHAT ARE SECONDARY sTORAGE DEVICES?Also called auxiliary storage devices or persistent storage media are computer hardware devices involved in the storage of data, permanently. These devices can be categorized as:  Floppy disk Related links ..
13/4/2019 DRAW A DIAGRAM SHOWING THE FUNCTIONAL UNITS OF A COMPUTER HARDWARE. NAME THE UNITSRead Now DRAW A DIAGRAM SHOWING THE FUNCTIONAL UNITS OF A COMPUTER HARDWARE. NAME THE UNITS
DIAGRAM SHOWING THE FUNCTIONAL UNITS OF A COMPUTER HARDWARE.
01. INPUT DECICES
These are devices that enter data into a computer and also covert data from human readable form to machine readable form.
Examples of these devices include:
02. Central Processing unit
The CPU-Central Processing Unit is a device made from a collection of integrated circuits. Its main functions are:
03. Primary Storage
These are devices that provide temporary storage for task that are to and from processing. They include:
04. Secondary Storage
These are devices that permanently store data in the computer or they are portable. They include:
Related Searches:
05. Output Devices
These are devices that display activities in the CPU to the user and converts information from machine readable form to human readable form. These devices include:
12/4/2019 Matching computer generations with the technology used to manufacture their processorsRead Now
In the evolution of computers, each of the passing computer generations had its own technology which was an improvement of the previous technology. Below is a match of computer generations with their processor technology and what each of the processors were capable of.
01. FIRST GENERATION COMPUTERS
They used thermionic valves
This is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. as a thermionic tube or thermionic valve uses the phenomenon of thermionic emission of electrons from a heated cathode and is used for a number of fundamental electronic functions such as signal amplification and current rectification. [Source: https://en.wikipedia.org/wiki/Vacuum_tube] 02. SECOND GENERATION COMPUTERS
They used transistors
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. How does a transistor work ? By turning a small input current into a large output current, the transistor acts like an amplifier. But it also acts like a switch at the same time. When there is no current to the base, little or no current flows between the collector and the emitter. Turn on the base current and a big current flows. [Source: https://www.quora.com/What-is-the-use-of-transistors-in-a-circuit#] 03. THIRD GENERATION COMPUTERS
They used Integrated Circuits (ICs)
A collection of transistors make up an Integrated Circuit An integrated circuit (IC), sometimes called a chip or microchip, is a semiconductor wafer on which thousands or millions of tiny resistors, capacitors, and transistors are fabricated. An IC can function as an amplifier, oscillator, timer, counter, computer memory, or microprocessor. A particular IC is categorized as either linear (analog) or digital, depending on its intended application. [Source: https://whatis.techtarget.com/definition/integrated-circuit-IC] 04. FOURTH GENERATION COMPUTERS
They used very large scale integrated (VLSI)
VLSI is an acronym that represents Very Large Scale Integrated. A collection of Integrated Circuits (ICs) Make up VLSI An Integrated Circuit is the circuit in which all the Passive and Active components are fabricated onto a single chip. Initially the Integrated Chip could accommodate only a few components. As the days passed, the devices became more complex and required more number of circuits which made the devices look bulky. Instead of accommodating more circuits in the system, an Integration technology was developed to increase the number of components that are to be placed on a single chip. This Technology not only helped to reduce the size of the devices but also improved their speed. Depending upon the number of components (Transistors) to be integrated, they were categorized as SSI, MSI, LSI, VLSI, ULSI & GSI. Small Scale Integration (SSI):
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What is an operating system
An operating system is a collection of integrated computer programs that provide recurring services to other programs or to the user of a computer.
These services consist of disk and file management, input/output activities, storage resources, diverse support services and control of various resources.
Ssmengg.edu.in describes an operating system as a program that acts as an intermediary between a user of a computer and the computer hardware. it further adds "the purpose of an operating system is to provide an environment in which a user can execute programs and the primary goal of an operating system is thus to make the computer system convenient to use."
Linux Logo
Tutorial point describes an Operating System (OS) as an interface between a computer user and computer hardware. An operating system is a software which performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers.
Some popular Operating Systems include Linux Operating System, Windows Operating System, VMS, OS/400, AIX, z/OS, etc. factors to consider when choosing an operating system
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dEFINITION OF dISTRIBUTED SYSTEMS
A distributed system is a collection of computers on the same network which process data independently and once data has been updated in one computer, other computers of the same system automatically update their database too.
A distributed system can also be defined as a collection of independent computers that appears to its users as a single coherent system Distributed processing refers to the type of processing where computers in various geographical locations are interconnected via communication links for the purpose of local processing and data access and/or transfer. In distributed processing data processing occurs on each of the computers, unlike a centralized processing system in which terminals are connected to a host computer that performs all of the data processing. Advantages of distributed systems
Disadvantages of distributed system
Works Cited
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Definition of Normalization
Normalization is the process of organizing data in a database by establishing relationships between tables according to rules designed both to protect the data and to make the database more flexible by eliminating redundancy and inconsistent dependency, insertion anomaly, update anomaly & deletion anomaly.
Objectives of Normalization
Works Cited:
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uSES OF COMPUTERS IN HEALTH SYSTEMS01. KEEPING OF RECORDS
02. RESEARCH
03. TRANSACTIONS SUCH AS HOSPITAL BILLS
04. SECURITY
05. DIAGNOSING PATIENTS
06. AUTOMATING LIFE SUPPORT MACHINES
07. LABORATORY ANALYSIS
08. PREPARING AND ANALYSING REPORTS
09. COMMUNICATIONS
10. SUPPORTING HOSPITAL INFORMATION SYSTEMS
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OPERATIONAL METHODS OF AN ORGANIZATION ENSURING THE SAFETY OF DATA01. USE OF PASSWORDS AND PIN NUMBERS
A password is a secret code provided to a system to access its resources. Passwords and pin numbers are provided to an individual to deter any unauthorized access.
02. USER ACCESS LEVEL
This is a process by which the system administrator gives separate accounts with different access rights for each user to protect sensitive data from unwanted audience. Each user in the system is given a set of resources to access the system depending on his/her nature of the job he does. In most cases, the top management are given access to confidential data and employees are given access to filtered and limited data.
03. USING FILE ATTRIBUTES SUCH AS READ ONLY, HIDING ETC.
Most systems provide features such as hiding data or changing file properties to Read Only. This move ensures that original files are not tampered with or altered to change meaning.
04. DATA ENCRYPTION
Encryption is a secure process for keeping personal and confidential information private. It is a process by which bits of data are mathematically coded using a password key/encryption key. The encryption process makes the data unreadable unless or until decrypted using decryption key known only by the user.
05. USE OF BIOMETRIC SYSTEMS
A biometric system is an automatic identification system based on matching of biological features to authenticate a system to respond. Examples include: finger prints recognition, facial recognition, eye recognition, DNA recognition, voice recognition, palm recognition etc.
06. DATA BACKUP
Backing up data is making copies of data from the original file and saving it somewhere else which may be used to restore the original after a data loss event.
07. SECURITY QUESTIONS/STAMP
This is a data security measure that ensures the system authenticate after the visitor answers a number of questions correctly as was provided during signup.
08. SECOND LEVEL AUTHENTICATION PROCEDURES
This security measure lets the system authenticate after a secret code has been provided which is sent through a third party system such as email or SMS but belonging to the user as was provided during signup.
09. USE OF reCAPTCHA TECHNIQUE
This is a Technique in data security that tests whether the system user is human or bot.
10. USE OF ANTI-MALWARE/ANTI-VIRUS SOFTWARE
Installing anti-malware or antivirus ensures that the system is not corrupted from malicious software made by hackers to harm or eavesdrop information from the organization.
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meaning of data privacyData privacy means that data or information belonging to an individual should not be accessed by or disclosed to other people. Its an individual's right to determine for themselves what should be communicated to others. meaning of data securityData security is the confidentiality, integrity and availability of data. Confidentiality of data implies that sensitive data or information belonging to an organization or government should not be accessed by or disclosed to unauthorized people, such data includes office documents, chemical formula, employee's details, examinations etc. Integrity of data implies that data should not be modified without owner's permission. Availability of data implies that information must be available on demand. DISSIMILARITY between data privacy and data security
3/4/2019 Reasons why people may resist the introduction of computers at their place of workRead Now Why should people resist computers in their work place?01.
Computers may lead to job replacement and displacement.
This means that computers may make a person lose his/her job or root for the transfer of a worker to another department. A condition like this one may make people resist computers at their work place. 02.
Computers require skilled manpower.
Usage of computers requires the staff to be trained for necessary skills to handle them. For those who don't see training as a good idea, will resist its implementation in a work place. 03.
Computers have adverse effects on our health.
It is believed that computers cause cancer, electromagnetic radiation, changes in brain activity, eye problems and sleeping patterns. However, scientists are still researching on these areas to establish elements of computers that are responsible for these problems and how they can be avoided. 
04.
Some people are just bureaucratic.
Some people in work places are just difficult to change, they follow excessively complicated administrative procedures that demands things to be done they way they used to be. Examples of these bureaucrats are school heads who demand professional records to be handwritten rather than being typed and printed. They think that handwritten records are more original than the printed ones. These are the kind of people who will never tolerate computer changes in their institutions. 05.
Attitude problems leading to computer-phobia
There are certain personalities who just hate computers because they either acquired this attitude myth or had previous shallow experience with computers. These people may likely resist the introduction of computers in their workplace and if it is introduced, they will blame it for everything bad that happens. 06.
Fear of increased work in their workplace
Computers sometimes increases the amount of work in a work place. This is especially if new programs and applications are added to be used by the system. And if there will be no addition of manpower, handling them on top of your normal tasks can sometimes be overwhelming, in this case, people tend to resist them in their work places for fear of additional tasks. 07.
Fear of increased initial costs
Introduction of computers require high initial costs however their benefits outweigh the costs (cost effectiveness). Some people may oppose implementation of computers in their workplace simply because they fear the initial costs. 08.
Poor communication skills/strategies
Bad communication skills from the top management to workers below them may trigger workers to resist technology change. Communication breakdown, misinformation or inaccurate communication can be a recipe on why people may opt to resist technological change. Changes that are mandated with little or no communication, on the other hand, are often poorly received, since employees may feel that the change is being shoved down their throats. When it comes to change management there’s no such thing as too much communication. If there is no immediate information to communicate during the change, telling employees that there is no update regarding the ongoing change is communication! Don’t just keep quiet; this is also the time to maintain an open door policy regardless of where you are placed in the organization. 09.
The Rapid Pace of Change
People often reject technology because it presents changes, big or small, to their immediate world, a world to which they have worked hard to adjust. People usually resist to anything that disturbs their social order and if done rapidly, change may never be taken seriously, this can lead to drastic opposition and resistance. 10.
Poor Timing:
This is another viable reason why employees resist introduction of computers at work. Change must be introduced when there are no other major initiatives going on. Sometimes it is not what a leader does, but it is how, when and why she or he does it that creates resistance to change! Undue resistance can occur because changes are introduced in an insensitive manner or at an awkward time. Works Cited
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What it means by printing multiple copiesPrinting multiple copies implies that two or more papers are printed at the same time by only one printer. This is only possible by the use of impact printers such as a dot-matrix and a daisy wheel printer because they have special hammers that produce characters on a piece of paper. And behind every paper, there is a coupon copy that produces characters on another paper. This type of printing is majorly done where monetary transactions are carried out such as a bank. For example; when paying school fees through a bank, the bank produces three copies of receipts (whitish, blueish and pinkish) in color. One copy for the bank, another for the school and the last one for your own records. To produce these receipts (vouchers/slips), the bank prints them in multiple copies using impact printers.  Dot Matrix Printer What it means by printing multiple pagesPrinting multiple pages is a situation where printers automatically make characters on a piece of paper (one paper at a time) but automatically pulls the next paper in a series once the current is over, this process repeats until the printing task is accomplished. Printing multiple pages depends on the printing mechanism of the printer. There are those printers that can only print one side of the page at a time and others reverse the page to print on the other side. It is called back to back printing. Any type of printer can handle multiple page printing, however the desk-jet printer and laser-jet printers are preferred for this job because of their printing speed.  desk-jet printer Images courtesy of Pinterest
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FORMATTING FEATURES OF WORD PROCESSORSwHAT ARE FORMATTING FEATURES?
These are word processor enhancements that makes user's work appealing to the eye.
What are these formatting features?
Font color is used to change text color
Makes text look like it was highlighted by a marker pen.
Apply a visual effect to the selected text such as shadow, glow or reflection
Superscript creates a small text above the normal line of text.
Subscript creates a small text below the normal line of text. 
Draws a line through the middle of the selected line
Bolding makes text thicker and darker
Italics make text slant forward Underline is a feature that puts a line below selected text 
this is a feature used to change text font themes
this is a feature used to increase
or decrease the size of text
Numbered list is a feature that index items in numbered style e.g.
Increasing indent pushes text away from the page margin
Decreasing indent pushes text closer to the page margin 
this is a formatting feature used to increase or decrease spaces between lines of text and paragraph
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WHAT ARE ELECTRONIC SPREADSHEETS? An electronic spreadsheet is a software with worksheets made of cells that can save, edit. format and manipulate numeric values automatically. WHAT ARE TYPEWRITERS? A typewriter is an analogous machine with keys for producing characters, numerals and symbols on a piece of paper. WHAT ARE THE MERITS OF SPREADSHEETS OVER TYPEWRITERS?
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31/3/2019 STATE REASONS WHY IS RECOMMENDED TO HAVE STANDARD FURNITURE IN THE COMPUTER LABORATORYRead Now STATE REASONS WHY IS RECOMMENDED TO HAVE STANDARD FURNITURE IN THE COMPUTER LABORATORYWhat it means by standard furnitureThese are tables, chairs and shelves that have the quality required to set them up in the computer laboratory for use of computers and computer users. There are two common types of furniture that can be found in the computer laboratory namely:
Why standard furniture?
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29/3/2019 STATE FOUR CHARACTERISTICS OF COMPUTERS THAT MAKES THEM SMARTER THAN HUMAN BEINGSRead Now STATE FOUR CHARACTERISTICS OF COMPUTERS THAT MAKES THEM SMARTER THAN HUMAN BEINGS1. THEY ARE EFFICIENT
this means they can achieve maximum productivity with minimum wasted effort or expense.
2. THEY ARE ACCURATE
computers rarely make mistakes and when they make, its as a result of poor programming by humans or the mistakes are too small thus negligible.
3. THEY ARE FAST IN PROCESSING
computers are very fast in processing, a no-match with humans.
4. THEY ARE RELIABLE
computers can be trusted to deliver results. Humans are almost unpredictable and have no boundaries or principles
5. THEY CAN WORK IN HAZARDOUS AREAS
no humans can work in hazardous places. Computers can
6. THEY DON'T NEED SUPERVISION
they don't need you to supervise them. they need software to control them
7. THEY MAY HAVE A LARGER MEMORY AND STORAGE WHICH IS QUICKER TO ACCESS THAN HUMANS
Most computational neuroscientists tend to estimate human storage capacity somewhere between 10 terabytes and 100 terabytes, though the full spectrum of guesses ranges from 1 terabyte to 2.5 petabytes. (One terabyte is equal to about 1,000 gigabytes or about 1 million megabytes; a petabyte is about 1,000 terabytes.) Meanwhile a 64 bit Linux empowered computer can have a maximum of 256 Terabytes. At the 2015 Flash Memory Summit in California, Samsung unveiled the largest capacity hard drive in the world. It's a 2.5-inch solid state drive (SSD) that can hold 16 terabytes of data (15.36TB, to be exact).
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STATE FIVE WAYS HOW KENYAN YOUTHS CAN USE COMPUTERS TO CREATE JOBS1. RETAIL COMPUTERS
buy and sell computers at a profit
2. ENGAGE IN PROGRAMMING
programming is the best paying job in the world. Learn programming and start making your own applications that solves society problems. It pays better than being employed.
3. ENGAGE IN GRAPHIC & ENGINEERING DESIGNS
learn to edit pictures, videos and podcasts. Also create your own firm for doing engineering designs using AUTOCAD and ADOBE products
4. LAUNCH A COMPUTER SCHOOL
start your own computer school and teach computer applications, ICT and IT related fields such as ADOBE packages, Office, Programming, maintenance of computers and Graphics
5. ENGAGE IN ONLINE MARKETING & BLOGGING
online marketing is the second best paying career in the field of computers. Internet marketing, or online marketing, refers to advertising and marketing efforts that use the Web and email to drive direct sales via electronic commerce, in addition to sales leads from websites or emails. Learn more @ https://learndigital.withgoogle.com/digitalskills/course/digital-marketing
6. LAUNCH CLOUD COMPUTING SERVICES
cloud computing is the act of using a network of remote servers hosted on the Internet to store, manage, and process data, rather than a local server or a personal computer. Cloud computing business is the process of installing server computers to store, manage and process data on behalf of your clients (customers) at a fee agreed over a period of time. this can also involve SEO services, webdesign services, database management etc.
7. REGISTER, BUY, PARK AND SELL DOMAINS, DESIGN WEBSITES AND MOBILE APPLICATIONS
a domain is a name that represents the IP address of your website. for example, www.atikaschool.org, atikaschool.org is the domain name that represents (199.34.228.77) , .org is the extension that represent organisation and WWW is a name given to any device on the same network. You can therefore start a business of selling domains such as xxx.co.ke
8. OFFER TECHNICAL SERVICES SUCH AS REPAIR AND MAINTAINANCE
many people have invested in software and forgot that hardware could also make money. get necessary skills from college and start your own firm that maintains and repairs gadgets like laptops, printers, smartphones, desktops, networking, also software repair and installation
9. ENGAGE IN NETPRENEURSHIP AND FREELANCE SERVICES
netprenuership is the process of doing business on the internet such as retail of books, cosmetics, clothes, shoes, electronics etc. examples of netpreneurship businesses include Jumia, Pigiame, Alibaba, Amazon etc.
10. PRODUCTION OF VIDEOS, ENTERTAINMENT, PODCASTS & MUSIC LYRICS
computers have replaced music instruments in the production of music.a well established studio pays handsomely. get your bet on this and look at Homeboyz productions, Calif records and Mix Masters as a benchmark.
27/3/2019 STATE THREE SAFETY PRECAUTIONS YOU WOULD UNDERTAKE IF THE COMPUTER LABORATORY YOU ARE WORKING IN CATCHES FIRERead Now STATE THREE SAFETY PRECAUTIONS YOU WOULD UNDERTAKE IF THE COMPUTER LABORATORY YOU ARE WORKING IN CATCHES FIRE1. RAISE ALARM
raising alarm alerts people who will rush for help and evacuation
2. RICH FOR THE FIRE EXTINGUISHER AND TRY TO PUT OFF
if you can reach for a fire extinguisher, try to put it off before it spreads further
3. TRY TO EVACUATE OTHER STUDENTS
try to evacuate other students using the procedure above. in most cases, use the emergence door if it exists and converge to the fire assembly point
4. IF YOU CAN SPOT POWER MAIN SWITCH, TURN IT OFF.
switching off power from the main switch will control its spread.
5. BEND LOW AS YOU EXIT TO AVOID SUFFOCATION FROM SMOKE.
when fire burns, it releases smoke which moves upwards in most cases unless influenced by wind, to avoid being choked by smoke, bend low as you exit and try to open windows for smoke to escape
26/3/2019 STATE FOUR REASONS WHY SMALL COMPUTERS SUCH AS PALMTOPS SOMETIMES TEND TO BE MORE EXPENSIVE THAN DESKTOPS WITH THE SAME FEATURES.Read Now STATE FOUR REASONS WHY SMALL COMPUTERS SUCH AS PALMTOPS SOMETIMES TEND TO BE MORE EXPENSIVE THAN DESKTOPS WITH THE SAME FEATURES.1. Small computers have high demand. This pushes prices high
Increase in demand increases the price of a commodity according to the laws of economics
2. The technology used to manufacture small computers is more advanced
New technologies always comes with a price
3. They are portable
this increases demand
4. Have internal battery
Extra battery means more costs
5. They consume less power
drives up demand
6. They occupy less space
drives up demand
7. They have more multimedia capabilities and social media applications that drives up costs
this is extra cost
8. They can be used in the absence of power
increases demand
9. Some are made from precious metals such as gold
this factor increases prices
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WRITE THE FOLLOWING ACRONYMS IN FULL1. AI
Artificial Intelligence
Artificial intelligence (AI) is a branch of computer science that emphasizes on the design and creation of intelligent machines that work, behave and respond like humans. Some of the characteristics that AI emphases on include: Speech recognition, Learning, visual perception, logical and arithmetic analysis and translation between languages.
2. ICT
Information and Communication Technology
Information and communication technology (ICT) is an advancement term for information technology (IT) that emphises on the technologies that provide access to information through the integration of telecommunications (telephone lines and wireless signals) and computers, as well as necessary enterprise software, middleware, storage, and audiovisual systems, that enable users to access, store, transmit, and manipulate information.
3. ENIAC
Electronic Numerical Integrator And Computer
In 1942, physicist John Mauchly and John Presper Eckert proposed an all-electronic calculating machine. The result was ENIAC (Electronic Numerical Integrator And Computer), built between 1943 and 1945 — the first large-scale computer to run at electronic speed without being slowed by any mechanical parts. ENIAC was designed and primarily used to calculate artillery firing tables for the United States Army's Ballistic Research Laboratory, its first program was a study of the feasibility of the thermonuclear weapon. In 1953, the Burroughs Corporation built a 100-word magnetic-core memory, which was added to the ENIAC to provide it with memory capabilities. By 1956, the end of its operation, the ENIAC occupied about 1,800 square feet and consisted of almost 20,000 vacuum tubes, 1,500 relays, 10,000 capacitors, and 70,000 resistors. It also used 200 kilowatts of electricity, weighed over 30 tons, and cost about $487,000. Sources: https://www.computerhope.com/jargon/e/eniac.htm, https://whatis.techtarget.com/definition/ENIAC, https://en.wikipedia.org/wiki/ENIAC
4. UPS
Uninterruptible Power Supply
This is an Uninterruptible Power Supply. It cleans power as it enters into the computer by eliminating power surges and brownouts, it alerts the user when power goes off by producing a beeping sound and also keeps power to power the computer shortly after blackout so that the computer user can be able to save his/her work.
5. CPU
Central Processing Unit
Read more about the CPU ...
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25/3/2019 DESCRIBE THE FOLLOWING TYPES OF COMPUTERS: DIGITAL,DEDICATED, MAINFRAME COMPUTERSRead Now DESCRIBE THE FOLLOWING TYPES OF COMPUTERS: DIGITAL,DEDICATED, MAINFRAME COMPUTERS
This is a digital computer; computers that process data which is discontinuous (discrete) in nature. Yourdictionary.com further adds that, these are computers that process data which is inform of digits called binary digits represented by 0s and 1s
Mathsisfun.com describes discrete data as a type of data that can only take certain values such as the number of students in a class can only be represented as a whole number (this data can either be 40 or maybe 60 but it can never be 60.5 (this is continuous data)); continuous data is represented with values which can be rational such as the height of a person, weight or mass of a body or time in a race.
In addition Numerical Data can be Discrete or Continuous: Discrete data is counted while Continuous data is measured
Dedicated computers are general purpose computers however these computers are devoted to carry out one task only. For instance, a general purpose computer can be devoted for accounting in a bank or office, as a teaching aid in a school or for graphic editing in a studio or engineering firm.
When computers are classified according to their physical size, the word mainframe is always mentioned. This is a type of computer which is the second largest of all computers, only second after super computers but bigger than mini and micro computers. They are relatively more powerful in processing with large capacity in memory and storage but inferior to super computers if measured in capabilities.
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STATE ANY FOUR DEVICES FOUND IN THE COMPUTER CHASSIS (SYSTEM UNIT)
The memory of a computer provides the computer with impermanent storage of data and information where the CPU can easily fetch from for processing
The mother board also called system board is the single largest unit in the computer chassis. It holds other devices that are attached to it such as resistors, capacitors, extension slots, ports, transducers, integrated circuits, central processing units, graphic adapters the list is long
A disk drive is any gadget in the system unit that acts as a container where permanent storage devices are put to read and write data or information. They include: hard disk drive, CD/DVD drive, SD drive, floppy drive, card drive, tape drive, zip drive etc.
The CPU is the single most expensive gadget in a computer and the most important of all other gadgets. It is also called a processor or a microprocessor (a terminology used to refer the CPU of micro computers). The main role of the CPU is to manipulate both logical and numeric data for something meaningful called information.
The power supply unit (PSU) is a gadget in the computer chassis whose main role is to convert electric power from alternating current to direct current for the consumption of the computer. It also supplies power to the system board, disk drives and internal loud speakers
This is a system fan, an aerator or air cooler propelled by a motor beneath. It cools down the heat sink that sucks heat from the CPU when processing takes place. Its is among the cooling systems in the system unit especially areas near the CPU and The power supply unit
This is a heat sink. It is made from a very good conductor of heat such as aluminium. It's main objective is to cool down the CPU by sucking heat and distributing it along it's surface area for cooling to take place.
Computer internal speakers are strategically installed in the system unit to amplify sound
Light emitting diode or LED is a bulb like gadget in the computer chassis whose main objective is to signal when power is on, when the CPU is processing and messaging of alerts and interruptions.
Graphic cards are gadgets in the system unit that provide the VDU - video display unit (screen/monitor) with images, color and information from the CPU for display via data interface media such as parallel and serial data cables. examples include VGA, SVGA, EVGA etc.
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