tähisena
C = 100 (Roman numeral)
C = 12₁₀ (in hexadecimal system)
C = kulon (coulomb)
C = süsinik (carbon)
c = senti- (centi-) = 10^-2
c = valguse kiirus (the speed of light in a vacuum) = 299,792,458 m/s
© = autoriõiguse märk (copyright symbol)
℃ = Celsiuse kraad (degree Celsius)
¢ = sent (cent)