Why
computer using 0101 Bits
First of all the
computer is fully electronic devices combined in one place .
Computers use binary - the digits 0 and 1
- to store data. A binary digit, or bit, is the smallest unit of
data in computing. It is represented by a 0 or a 1. Binary numbers are made
up of binary digits (bits), eg the binary number 1001.
The circuits in
a computer's processor are made up of billions of transistors. A transistor is a tiny
switch that is activated by the electronic signals it receives. The digits 1 and 0 used
in binary reflect the on and off states of a transistor.
Computer programs are
sets of instructions. Each instruction is translated into machine
code -
simple binary codes that activate the CPU. Programmers write
computer code and this is converted by a translator into binary
instructions that the processor can execute.
All software, music, documents, and
any other information that is processed by a computer, is also stored using
binary.
Encoding
Everything on a
computer is represented as streams of binary numbers. Audio, images and
characters all look like binary numbers in machine code. These numbers are
encoded in different data formats to give them meaning, eg the 8-bit pattern 01000001 could
be the number 65,
the character 'A',
or a colour in an image.
Encoding formats
have been standardised to help compatibility across different platforms. For
example:
v audio is encoded as
audio file formats, eg mp3, WAV, AAC
v video is encoded as
video file formats, eg MPEG4, H264
v text is encoded in
character sets, eg ASCII, Unicode.
v images
are encoded as file formats, eg BMP, JPEG, PNG.
Did
you know?
In the early
days of computing, the only way to enter data into a computer was by flicking
switches or by feeding in punched cards or punched paper tape.
Since computers
work using binary, with data represented as 1s and 0s, both switches and
punched holes were easily able to reflect these two states - 'on' to represent
1 and 'off' to represent 0; a hole to represent 1 and no hole to represent 0.
Charles
Babbage's Analytical Machine (in 1837) and the Colossus (used during the
Second World War) were operated using punched cards and tapes. Modern computers
still read data in binary form but it is much faster and more convenient to
read this from microchips or from magnetic or optical disks.
For more
you know the about the Transistor here the link for you .
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