Computer needs memory to store permanent programs, which are set of instructions to perform various tasks. They also need memory to store data and information temporarily while they are processing it. For Example assume computer needs to add numbers 2,3 & 4. It will first add numbers 2, 3 to get 5. This total of 5 will be stored in memory so that the next number 4 can be added to it. Human memory is intangible while computer memory has physical form: Small silicon chips where data and information is stored

MEASURING COMPUTER MEMORY Computer memory is measured by stating how many units of data or information the computer can store. Every number can be converted to binary digits, that is some combination of 0's and 1's. The binary digit is called bit for short. The bits that form the character are usually 8,16 or 32 bit long

BYTE:
A collection of 8 bits is called a byte.

Computer memory is measured in bytes, which is the smallest unit of memory Since computers have very large memories, bytes are now expressed in thousand and multiple of thousands.



1024 Bytes 1kilobyte 1024 kilobyte 1 Megabyte 1024 Megabyte 1Gigabyte 1024 Gigabyte 1Terabyte