Main computer components
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This is for the people those want to learn about technology. It will be helpful especially for the students of Pearson Edexcel and Cambridge.
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Main computer components
- 1. www.expertinenglish.blogspot.com Main Computer Components Central Processing Unit (CPU) Main Memory Peripheral devices Input devices Output devices Secondary or backup storage
- 2. www.expertinenglish.blogspot.com Central Processing Unit (CPU) It is the BRAIN of the computer. It carries out SOFTWARE INSTRUCTIONS. The speed of CPU is measured in HERTZ (Hz). It has THREE parts: main memory, arithmetic and logic unit (ALU) and control unit (CU). Example: Pentium, AMD
- 4. www.expertinenglish.blogspot.com Main Memory It is the GROUP OF CHIPS inside the processing unit. It is also known as IMMEDIATE-ACCESS STORE (IAS). There are TWO types of main memory: random access memory (RAM) and read only memory (ROM). FOOT NOTE: RAM holds the programs currently running. ROM holds boot-up program.
- 6. www.expertinenglish.blogspot.com Peripheral devices Peripheral devices are devices OUTSIDE the central processing unit but under its CONTROL. They may be INPUT DEVICES/OUTPUT DEVICES/STORAGE DEVICES. Example: Keyboard, Printer
- 8. www.expertinenglish.blogspot.com Input devices Devices that pass data into the computer are known as INPUT DEVICES. Example: Mouse, Webcam
- 10. www.expertinenglish.blogspot.com Output devices Devices that take data from the computer are known as OUTPUT DEVICES. Example: Monitor, Sound box
- 12. www.expertinenglish.blogspot.com Secondary or backup storage Secondary or backup can store data in a computer system PERMANENTLY. It is NON-VOLATILE, so data that is stored on these devices remains there safely. Example: Hard disk, USB Memory Stick