What are the basic units or components of a computer

Following are the main basic components of the computer:
	1. Input Unit 2. Output Unit 3. Central Processing Unit( CPU / Processor) 4. Memory Unit 5. Storage Unit
1. Input Unit Input unit consists of input devices. Input devices are used to enter data and instructions into computer memory. Examples of input devices are Keyboard, mouse, scanner, digital camera and microphone etc. 2. Output Unit Output unit consists of output devices. Output devices are used to show results produced by computer after data processing. Examples of output devices are Monitor, Printer, plotter, data projector speaker etc. 3. Central Processing Unit Central processing unit is also called CPU or Processor. It is the brain of the computer. It performs data processing. It controls overall operations and compents of the computer. CPU consists of three main parts: a)Arithmetic Logic Unit or ALU ALU performs arithmetic and logical operations on data. b)Control Unit Control unit controls overall operations and components of a computer. c)Registers Registers are very small and very fast temporary memory areas in CPU. Registers are used to store currently processed data and instruction. 4. Memory Unit Memory unit consists of memory devices to store data temporarily or permanently. Examples of memory devices are RAM and ROM. 5. Storage Unit Storage unit consists of storage media. Storage media are used to store large amounts of data permanently. Examples of storage media are Hard disk, CD, DVD and Zip disk etc.