Page 12 - iPrime_V2.2_class7
P. 12
Video Card
A Video card, also known as a graphic card. It is used to convert
digital data into video format and vice-versa. After converting the
digital data into a video, it displays the output on a display device such
as a monitor or TV. Video card is also used to improve the quality of
Video Card pictures and videos. It has processing as well as storage capabilities.
External Hardware Components
The hardware components located outside the CPU box are called external hardware
components. As these components are connected to the computer externally, they are also called
peripheral components. External hardware components can be classified into three categories:
External Hardware Components
Input Devices Output Devices Storage Devices Hybrid Devices
Let us discuss these in detail.
Input Devices
A computer accepts data and instructions through input devices. Data can be in the form of
numbers, text, sound or graphics. Some of the input devices are:
Keyboard: A keyboard is the primary input device for
a computer. Similar to an old typewriter, a keyboard
consists of buttons called keys. By pressing these keys,
you can input data in the form of words and numbers.
Keyboard
A standard keyboard has 104 keys, which can be classified
as follows:
• Alphanumeric Keys: A-Z, a-z, 0-9
• Control Keys: Ctrl, Alt, Esc, etc.
• Function Keys: F1-F12
• Special Keys: Caps Lock, Backspace, Spacebar, Arrow keys, Home, End, etc.
• Punctuation Keys: “ ” - ‘ ; , etc.
Mouse: It is a pointing device that allows data to be input into
a computer using commands such as point, click, and drag. It
controls the pointer’s movement on the screen. It is used to move
and select icons, files, and folders on your computer. There are two
main types of mice: optical and mechanical.
An optical mouse is an advanced computer pointing device that
uses a Light Emitting Diode (LED) and an optical sensor. This type
of mouse does not require internal cleaning since it has no rotating Optical Mouse
parts; however, dust can accumulate near the light emitter over time.
10 Touchpad iPRIME (Ver. 2.2)–VII

