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CODING SYSTEMS CODING SYSTEMS
CODING SYSTEMS CHARACTERS • digits: 0 – 9 (numeric characters) • letters: alphabetic characters • punctuation marks: special characters
CODING SYSTEMS CODES • ASCII: American Standard Code for Information Interchange – commonest code – used to send information to and from microcomputers • Originally used a 7-bit code • An eight bit was added, this allowed an extra 128 characters to be represented • Nowadays ASCII is an 8-bit code
CODING SYSTEMS EBCDIC • Extended Binary Coded Decimal Interchange • an 8-bit code • this code allowed for international characters
characters D – P – 3 in both EBCDIC and ASCII CODING SYSTEMS Differences between ASCII and EBDIC