Computer Codes:

   What is BCD code? 

•   BCD stands for Binary Coded Decimal. 
• It is one of the early computer codes. 
• It uses 6 bits (2 – Zone , 4 – digit) to represent a symbol. 
• It can represent 64 (2⁶) different characters.

 

What is ASCII code?

• ASCII stands for American Standard Code for Information Interchange. 
• ASCII is of two types – ASCII-7 and ASCII-8. 
• ASCII-7 uses 7 bits to represent a symbol and can represent 128 (27) different characters. 
• ASCII-8 uses 8 bits to represent a symbol and can represent 256 (28) different characters. 
• First 128 characters in ASCII-7 and ASCII-8 are same.

 

   What is EBCDIC Code?

•  EBCDIC stands for Extended Binary Coded Decimal Interchange Code 
•  It uses 8 bits to represent a symbol           
•  It can represent 256 (2⁸) different characters