1C or 1c may also refer to: 1C Company, Russian software company 1 Cup (unit) California Proposition 1C (2009), a defeated California ballot proposition Cent (currency) 1 cent euro coins Penny (United States coin) Penny (Irish decimal coin) expression of genome size First Cambridge Catalogue of Radio Sources measure of charge rate for an electric battery National Highway 1C, an Indian highway
See also C1 (disambiguation)