C=AC0 - C=L - C=P - CC - CC0 - CFL - CLOG - CH - Check - CL#P - CkP - CNP - coAM - coC=P - cofrIP - Coh - coMA - coModkP - compIP - compNP - coNE - coNEXP - coNL - coNP - coNPcc - coNP/poly - coNQP - coRE - coRNC - coRP - coSL - coSPARSE - coUCC - coUP - CP - cq-Σ2 - CSIZE(f(n)) - CSL - CSP - CZK