94: Information and communication, circuits
Information and communication includes questions of particular interest to algebraists, especially coding theory (related to linear algebra and finite groups) and encryption (related to number theory and combinatorics). Many topics appropriate to this area can be expressed in graph-theoretic terms, such as network flows and circuit design. Data compression and visualization overlap with statistics.
Browse all (old) classifications for this area at the AMS.
De Bruyn, Kristien. "What is information theory?", Bull. Soc. Math. Belg. Sér. B 36 (1984), 215--234. MR86g:94001
Ross Williams has written a Painless Guide to CRC Error Detection Algorithms.
Among the appropriate newsgroups are sci.crypt, sci.electronics.design, and comp.arch.embedded.