The unit symbols for those units (A, C, P and K) are capitalized, but the units when spelled out (ampere, coulomb, pascal and kelvin) are not, just like the spe

The unit symbols for those units (A, C, P and K) are capitalized, but the units when spelled out (ampere, coulomb, pascal and kelvin) are not, just like the spelled out forms of liter, gram and meter.