68-XX - Computer science

68Rxx - Discrete mathematics in relation to computer science

1	68R01	General
2	68R05	Combinatorics
14	68R10	Graph theory (including graph drawing) [See also 05Cxx, 90B10, 90B35, 90C35]
2	68R15	Combinatorics on words
	68R99	None of the above, but in this section