Capital letters/characters are always UPPER case - everything else is lower case.
Strictly a capital character is the upper case letter most generally used at the start of a sentence.
Upper case characters used for given names and some nouns are initial capitals as in they are used as initials - so Terry David John Pratchett's initials are T.D.J.P
and Golems Talk Like This - are initial capitals
QED
Strictly a capital character is the upper case letter most generally used at the start of a sentence.
Upper case characters used for given names and some nouns are initial capitals as in they are used as initials - so Terry David John Pratchett's initials are T.D.J.P
and Golems Talk Like This - are initial capitals
QED