-- See Also Calculators Here are entered works on present-day calculators as well as on calculators and mechanical computers of pre-1945 vintage. Works on modern electronic computers first developed after 1945 are entered under Computers.
-- See Also the narrower term Computer arithmetic Here are entered works on machine arithmetic theories and hardware arithmetic functions associated with modern digital computers.
-- See Also the narrower term Counting Here are entered works on counting, including counting books. Works on the theory and systems of numbering are entered under Numeration. Works on the psychology of numeration are entered under Number concept.