Computers (pc, laptop, netbook, tablet pc etc) store information in the form of
1 and 0's in different types of storages such as memory (ram), hard disks, usb
drives, etc, to be processed by software. The most of common unit of data
storage is expressed as byte which is 8 bits.
For your information, computer data is expressed as bytes, kilobytes, megabytes
as it is in metric system, but 1 kilobyte is 1024 bytes not 1000 bytes.
Data storages starting from the smallest unit are: bit, byte, kilobyte (kb),
megabyte (mb), gigabyte (gb), terabyte (tb), petabyte and exabyte.