10C or X-C may refer to: HP-10C series, a 1981 Hewlett-Packard calculators series Oflag X-C, a World War II German prisoner-of-war camp for officers located near Lübeck in northern Germany Route 10C (WMATA), a bus route operated by the Washington Metropolitan Area Transit Authority Tenth Cambridge Survey of Radio Sources, Cambridge radio survey at 15.7GHz Carbon-10 (10C), an isotope of carbon
See also C10 (disambiguation)