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43 Cards in this Set
- Front
- Back
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Computer |
a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming |
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COMPUTER SYSTEM |
Is a collection of entities(hardware,software and liveware) that are designed to receive, process, manage and present information in a meaningful format |
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Computer hardware |
Are physical parts/ intangible parts of a computer. |
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Computer software |
also known as programs or applications. They are classified into two classes namely - sytem software and application software |
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Liveware |
is the computer user. |
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Liveware |
Also kwon as orgwareor the humanware. The user commands the computer system to execute on instructions. |
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Hardware |
refers to the physical, tangible computer equipment and devices, which provide support for major functions such as input, processing (internal storage, computation and control), output, secondary storage (for data and programs), and communication. |
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Computer system |
is a set of integrated devices that input, output, process, and store data and information |
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Input devices |
Are devices used for entering data or instructions to the central processing unit. Are classifie according to the method they use to enter data. |
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Keying devices |
Are devices used to enter data into the computer using a set of Keys eg Keyboard, key-to- storage and keypad. |
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Keyboard |
(similar to a typewriter) is the main input device of a computer. It contains three types of keys-- alphanumeric keys, special keys and function keys |
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Typing (alphanumeric) keys |
These keys include the same letter, number, punctuation, and symbol keys found on a traditional typewriter. |
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Special (Control) keys. |
These keys are used alone or in combination with other keys to perform certain actions. The most frequently used control keys are CTRL, ALT, the Windows key, and ESC. |
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Function Keys |
The function keys are used to perform specific tasks. They are labelled as F1, F2, F3, and so on, up to F12. The functionality of these keys differs from program to program. |
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Cursor Movement (Navigation) keys. |
These keys are used for moving around in documents or WebPages and editing text. They include the arrow keys, HOME, END, PAGE UP, PAGE DOWN, DELETE, and INSERT and ARROW KEYS. |
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Numeric keypad |
is handy for entering numbers quickly. The keys are grouped together in a block like a conventional calculator or adding machine. |
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Pointing devices |
are devices that enter data and instructions into the computer using a pointer that appears on the screen. |
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Mouse |
is a small device used to point to and select items on your computer scree |
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Scanning devices |
are devices that capture an object or a document directly from the source |
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Scanners |
used to capture a source document and converts it into an electronic form. |
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Types of scanners |
All in one scanner Flatbed scanner Drum scanner Handheld scanner |
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Central processing unit (CPU) |
is the brain or the heart of a computer. |
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Central processing unit (CPU) |
also known as processor |
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Control unit Arithmetic logic unit Main memory unit |
Three units of CPU |
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System unit |
is the core of a computer system |
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Microprocessor, CPU |
which acts as the "brain" of your computer |
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RAM |
which temporarily stores information that the CPU uses while the computer is on. |
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CPU, RAM |
important units of system unit |
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Peripheral device |
Hardware that is not part of the system unit is sometimes called |
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mouse, keyboard, printer, monitor, external Zip drive or scanner |
External peripheral devices |
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CD-ROM drive, CD-R drive or internal modem. |
Internal peripheral devices |
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Integrated peripheral devices |
Internal peripheral devices are often referred to as |
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Output device |
is any piece of computer hardware equipment which converts information into human-readable form. It can be text, graphics, tactile, audio, and video. |
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Computer software/software |
is a collection of data or computer instructions that tell the computer how to work. |
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Application software |
which is software that uses the computer system to perform special functions or provide entertainment functions beyond the basic operation of the computer itself. |
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System software |
which is software for managing computer hardware behaviour, as to provide basic functionalities that are required by users, or for other software to run properly, if at all. |
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Operating systems |
which are essential collections of software that manage resources and provide common services for other software that runs "on top" of them |
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Device drivers |
which operate or control a particular type of device that is attached to a computer. |
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Utilities |
which are computer programs designed to assist users in the maintenance and care of their computers. |
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Malicious software or malware |
which is software that is developed to harm and disrupt computers. |
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Open-source software (OSS) |
is a type of computer software in which source code is released under a license in which the copyright holder grants users the rights to use, study, change, and distribute the software to anyone and for any purpose. |
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Free software, or libre software, |
is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions. |
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Free and open-source software (FOSS) |
is software that can be classified as both free software and open-source software. anyone is freely licensed to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software. |
