94-XX - Information and communication, circuits

3		94-00	General reference works (handbooks, dictionaries, bibliographies, etc.)
34		94-01	Instructional exposition (textbooks, tutorial papers, etc.)
		94-02	Research exposition (monographs, survey articles)
21		94-03	Historical (must also be assigned at least one classification number from Section 01)
2		94-04	Explicit machine computation and programs (not the theory of computation or programming)
46		94-06	Proceedings, conferences, collections, etc.
34	(+149)	94Axx	Communication, information
37	(+4)	94Bxx	Theory of error-correcting codes and error-detecting codes
8	(+8)	94Cxx	Circuits, networks
		94Dxx	Fuzzy sets and logic (in connection with questions of Section 94) [See also 03B52, 03E72, 28E10]