1. ASCII code:
ASCII (American Standard Code for Information Interchange) is the most widely used coding system to represent data. ASCII is used on many personal computers and minicomputers. ASCII is a 7-bit code that permits 27 = 128 distinct characters. The 128 different combinations that can be represented in 7 bits are plenty to allow for all the letters, numbers and special symbols. An eight-bit was added. This allowed an additional 128 characters to be represented. The extra 128 combinations are used for symbols such as Ç ü è ©, ®, Æ, etc.
2. EBCDIC code:
(Extended Binary Coded Decimal Interchange Code) Pronounced “ebsuh-****.” The binary code for text as well as communications and printer control from IBM. This data code originated with the System/360 and is still used in IBM mainframes and most IBM midrange computers. It is an 8-bit code
(256 combinations) that stores one alphanumeric character or two decimal digits in a byte.
