The System Unit

Flash memory

Flash memory is a non-volatile computer storage chip that can be electrically erased and reprogrammed. It is primarily used in memory cards, USB flash drives, MP3 players and solid-state drives for general storage and transfer of data between computers and other digital products. It can retain data even if power is disrupted. It used for digital video camera, mobile phone and portable computers.

Graphic cards

A graphic card or video card is a piece of hardware installed in computer that is responsible for providing the image on the computer’s monitor or display screen. Other modern high performance video cards are used for more graphically demanding purposes, such as PC games.

Sound cards

A sound card or audio card  is a computer expansion card that facilitates the input and output of audio signals to and from a computer under control of computer programs. Typical uses of sound cards include supplying the audio component for multimedia applications such as music composition, editing video or audio, presentation, education, and entertainment games.

Network interface card (NIC)

A network interface card (NIC) is a computer circuit board or expansion card that is installed in a computer so that it can be connected to a network. Sometimes referred to as a LAN adapter. Network interface cards supply a dedicated, full-time connection to a network. Most home and portable computers connect to the Internet through as-needed dial-up connection.

Plug & Play

Plug and Play is a term used to describe the characteristic of a universal serial bus, or device specification, which facilitates the discovery of a hardware component in a system, without the need for physical device configuration, or user intervention in resolving resource conflicts.

Bus line

The bus lines are the communicating electronic lines that connect different parts of the CPU to various other parts. In addition, the bus lines also link the CPU to different parts on the system board of your computer. The data flows in the form of bits along the bus lines.

HDMI

HDMI (High Definition Multimedia-Interface) is a compact audio/video interface for transmitting uncompressed digital data. It is a digital alternative to consumer analog standards, such as radio frequency (RF) coaxial cable, composite video, S-Video, SCART, component video, D-Terminal, or VGA.

Cache memory

Cache (pronounced cash) memory is extremely fast memory that is built into a computer’s central processing unit (CPU). It is located next to it on a separate chip. The CPU uses cache memory to store instructions that are repeatedly required to run and load programs, improving overall system speed.