Presentation Theorems for Coded Character Sets

The notion of 'presentation', as used in combinatorial group theory, is applied to coded character sets(CCSs) - sets which facilitate the interchange of messages in a digital computer network(DCN) . By grouping each element of the set into two portions and using the idea of group presentation(whereby a group is specified by its set of generators and its set of relators), the presentation of a CCS is described. This is illustrated using the Extended Binary Coded Decimal Interchange Code(EBCDIC) which is one of the most popular CCSs in DCNs. Key words: Group presentation, coded character set, digital computer network