The System Unit

Flash Memory

Flash memory is a type of Electronically Erasable Programmable Read Only Memory. It is a memory chip. It maintains stored information without requiring a power source. Flash memory is often used in portable electronics like MP3 players and in removable storage devices.

Graphic Cards

A graphic card is also a video card which is a piece of hardware installed in a computer that is responsible in rendering images on the computer's monitor screen. A graphic card is basically an expansion card whose function is to generate and output images to a display.

Sound Cards

A sound card is also known as an audio card. It is an internal computer component that processes audio files to provide high-quality playback through the computer speakers. A sound card plays audio files, voice as well as music. The typical sound card has an interface which is available at the back of the computer with various input and output ports. The quality of the sound card and speakers both affect the overall sound quality of the computer system.

Network Interface Card (NIC)

Network Interface Card, or NIC is a device that allows computers to be joined together in a local area network (LAN). It is a computer circuit board or card that is installed in a computer. Computers typically contain a NIC specifically designed for the LAN transmission technology such as Ethernet. Network interface cards provide a full-time connection to a network.

Plug and Play

Plug and Play (PnP) is a capability that gives users the ability to plug a device into a computer and have the computer recognize that the device is there. It was developed by Microsoft for its Windows 95 and later operating systems. With this, the user is not required to explicitly tell the operating system when a new device had been added.

Bus Line

Bus lines are communicating electronic lines that connect different parts of the CPU to various other parts.  Bus lines also link the system unit to different parts on the system board of the computer. The bus lines are like multi-lane pathway which means that the more bus lines are on the system the greater is the rate of transfer of data along the bus. This also means the computer can run efficiently and will operate at a faster rate.

HDMI

HDMI is also known as High Definition Multimedia Interface. HDMI is an interface standard used for audiovisual equipment such as high-definition television and home theater systems. It is a compact 19-pin plug and cable for connecting High-Definition video and multi-channel audio-capable as well as helping to speed the convergence of computer and consumer AV products.

Cache Memory

Cache memory memory is extremely fast memory that is built into a computer’s central processing unit (CPU), or located next to it on a separate chip. The CPU uses cache memory to store instructions that are repeatedly required to run programs, improving overall system speed. This enables the CPU to not have to use the motherboard's system bus for memory transfer. Hence, the CPU is able to process data faster.