1. CODING SYSTEMS CODING SYSTEMS CODING SYSTEMS

2. CHARACTERS CHARACTERS digits: 0 – 9 (numeric characters) letters: alphabetic characters punctuation marks: special characters CODING SYSTEMS

3. CODES 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

4. EBCDIC Extended Binary Coded Decimal Interchange an 8-bit code this code allowed for international characters CODING SYSTEMS

5. Differences between ASCII and EBDIC characters D – P – 3 in both EBCDIC and ASCII CharacterDP3 EBCDIC 1100 01001101 01111111 0011 ASCII 0100 0101 00000011 CODING SYSTEMS