|
Computers store information in the form of 1 and 0's which is called bit. All
information, text, numbers, audio, video etc are converted into 1 and 0's and
stored in different types of storage in order to be processed by computer CPU.
The most of common unit of storage is expressed as byte which is 8 bits.
Computer data storage devices can be many types. RAMs (Random Access Memory) is
an example of primary data storage that can be accessed directly by CPU. This
is fast but also limited in capacity. That's why there are hard disks to store
more as secondary storage device but not directly accessed by CPU but via
input/output channels. Besides this, data can be stored in many devices such as
CDs, DVDs, Flash Drives, or big capacity tertiary storages which involves a
robotic mechanism in order to load the right unit from a cataloge etc.
Although computer data is expressed as bytes, kilobytes, megabytes as it is in
metric system, 1 kilobyte is 1024 bytes not 1000 bytes, as 1 megabyte is 1024
kilobytes not 1000 kilobytes.
|