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An extension card is an electronic card/board that is used to add extra functionality to a computer. It is in

Modem is defined as an acronym or abbreviation for modulator-demodulator, a device that makes it possible for computers to communicate without being

A computer port is a connection point or interface between a computer and an external or internal device. Internal device may connect such devices as hard drives and CD-Rom or DVD-Rom; External ports may connect modems, printers, mice and other devices.                          Types of computer parts include: 1.     Serial ports 2.     Parallel ports 3.     Small computer system interface(SCSI) ports 4.     Universal serial bus (USB) ports etc.

A liquid crystal display (LCD) monitor is a computer monitor or display that uses LCD technology to show clear images and is found mostly in laptop computers and flat panel monitors. This technology has replaced the traditional cathode ray tube (CRT) monitors, which were the previous standard and once were considered to have better pictures quietly then early LCD variants. With the introduction of better LCD technology and into continuous improvement, LCD is now the clear leader over CRT, in terms of color and picture quality, not to mention capabilities for large resolutions. Also, LCD monitors may be made much more cheaply than CRT monitor.

Motherboards also have a slot for a small lithium rechargeable battery. The space for the battery on the motherboard is usually small and round. It is usually the only space on the motherboard that the battery may fit into. This battery has a life span of about 4 years after which it, like all things dies and cannot hold charge anymore. Then it needs to be replaced. It is this battery that keeps the system from losing the contents of the Cmos, like your Bios settings. The battery rarely goes bad, you will know because: 1. The system will start to experience slow clock. By this we mean the stuff that tells you what time it is and not the system or bus clock which is different. 2. You may sometimes get such error messages as checksum error, simply put, the battery is almost dead that once the PC power is turned off and the battery is supposed to come on now to maintain such things as time, but it does not because it is dead.               When the battery is completely dead and the

Mouse is an output device used to direct the cursor in the computer screen. It is a hand

Casing refers to the outer covering of the system unit.      There are two types of casing: Power casing

The system’s power supply unit provides electrical power for every component inside the system unit, as well as to the video display

The keyboard is the most common type of input device. it looks like typewriter keyboard , but has more character and