System Unit

-RAM

Random access memory (RAM) is a hardware that holds the sequence of instruction and data that the present CPU is processing. Most of the RAMs holds temporary memory only ,everything in the RAM will be lost after the microcomputer is turned off .

-Cache

Cache (normally pronounce as cash) is a hardware that helps improve processing by acting as an high speed holding area between the memory and CPU.Cache helps to speed things up by remembering which things in the RAM is most frequently used .Therefore,CPU can quickly access that program through cache.

-ROM

Read Only Memory(ROM) is a hardware which is built into in the factory itself. This is different from RAM because the things in ROM cannot be changed. This hardware allows CPU the read and retrieve data written on the ROM chip.

-Flash Memory

Flash memory is a non-volatile program memory which can be electronically erased and changed . This is much different from RAM because RAM have to be hardwarelly changed. The use of flash memory is often used to hold control codes such as input and output system in a personal computer.

-Graphic Card

A graphic card is a device that is installed in the computer which consist of graphic processing unit . This program can help display images and graphics , especially 3D graphics.Graphic card also works as a reliever for hardwares and also contain their own memory which strain off the RAM.

-Sound Card

A sound card (also known as audio card) is a internal card that facilicate the input and output of audio signals and transform it into sound waves and produces sound . Usually sound cards provides the audio components such as music composition , audio editing and so on.

-Network Interface Card

A network interface card is a hardware which connects the computer to a computer network resulting to allow the use of internet at home , work etcetc. The network interface card is also known as network adapter or Local Area Network(LAN) adapter.

-Plug and Play

Plug and play is created microsoft since the use of windows 95 and now operating system which allows the user to plug in an device such as microphones, headphones, webcame into the computer .The plug and play hardware will be able to detect and recognize the use of the device which helps to futher technology and human needs.

-Universal Serial Bus port (USB)

Universal Serial Bus port is an external bus port which help to connect  and support data transfer at the rate of 12mbps. A single USB port can be used to connect up to the maximum of 127 peripheral devices such as mice , modems , keyboard. The USB port also supports the use of Plug and play system.