Encyclopedias, Almanacs, Transcripts, and Maps
- coly
- Comayagua
- comb jelly
- Combes, Émile
- Combin, Grand
- combinations (in mathematics)
- combining weight
- Comilla
- Commack
- Commagene
- Committee for Industrial Organization
- Commodus
- Common Cause
- Common Market of the South
- Common Weights and Measures ( (table))
- common-ion effect
- Commoner, Barry
- Commonwealth Fund
- Communications Satellite Corporation
- communistic settlements