How do computer store data ?

All the data stored in computer – every word, picture, number and sound – is captured as a series of electrical pulses that are either on or off. A number system called binary is used to represent these pulses with “1” meaning “on” and “0” meaning “off”.

A single binary digit, known as a “bit”, switches a single switch on or off. By linking together these switches, the computer can carry out the complex operations we demand.

Bits and bytes

1 bit = a binary digit either 1 (on) or 0 (off).

1 byte = 8 bits

1 kilobyte = 1,000 bytes

1 megabyte = 1,000,000 bytes

1 gigabyte = 1,000,000,000 bytes

1 terabyte = 1,000,000,000,000 bytes

How much data?

10 bytes = one word

2 kilobytes = one typewritten page

100 kilobytes = a low-resolution photograph

1 megabyte = a short novel

2 megabyte = a high-resolution photograph

100 megabyte = 17 hour of digital music

10 terabytes = all the printed works in the US library of Congress (the world’s largest library)

Ravindra Paradhi

Engineer & Blogger.

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