Page 17 - Computer Class 04
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Secondary Memory
This type of memory is also known as external memory . These are used for
storing data/information permanently. Contents of secondary memories
are first transferred to main memory and then, CPU can access it. For
example: CD, DVD, Hard disk, Pen drive etc.
CD DVD
Hard Disk Pen Drive
Hardware and Software
Hardware and software form the main parts of any computing device.
Hardware
Those physical parts of a computer that we can see and touch are called
hardware of a computer.
A computer system has many hardware parts. Let us look at them.
Computer System
Input Devices Processing Devices Output Devices Storage Devices
Keyboard, Central Monitor, Hard Disk
CD or
Mouse, Procesing Speakers,
DVD-ROM,
Scanner Unit Printer
Pen Drive
etc. (CPU) etc.
etc.
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