Computer being electronic machine it knows only “ON” or “OFF” (0’ or 1’). Any data that is to be fed, processed or stored should be converted into combination of 0s and 1s. This is called binary notation and
0 or 1 is called bits.
Bit is a basic memory unit.
Byte is a unit of data consists of 8 bites.
Kilo Byte (KB) equals 1024 – Bytes.
Mega Byte (MB) equals 1024 – Kilo Bytes.
Giga Byte (GB) equals 1024 – Mega Bytes.