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COMPUTER SYSTEM 2.3 INFORMATION CODING SCHEME (CODING SYSTEM (Important…
COMPUTER SYSTEM
2.3 INFORMATION CODING SCHEME
CODING SYSTEM
A bit is the smallest unit of data a computer
can process.
The combinations of 0s and 1s that represents
characters are defined by a coding scheme.
ADVANTAGES :
Enable humans to interact with a digital computer
that processes only bits.
Enables components in computers to
communicate with each other successfully
Important coding scheme to represent
data:
ASCII (American Standard Code for Information
Interchange)
EBCDIC (Extended Binary Coded Decimal
Interchange Code)
Unicode (Universal Code)
ASCII
• 8-bit coding scheme designed to represent
English alphabets and some special symbols.
Uses 8 bits to represent one character.
Can represent 256 different characters.
Used on all types of computer and operating
systems.
EBCDIC
• 8-bit coding scheme designed to represent
English alphabets and some special symbols.
• Uses 8 bits to represent one character.
Can represent 256 different characters.
Used on IBM mainframe computers and high
end servers
UNICODE
16-bit coding scheme that has the capacity to
represent all the world’s current languages.
• Uses 16 bits to represent one character.
Can represent 65536 different characters or
symbols.
Used on all types of computer and operating
systems