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.
Here are entered works on facilities where numerical calculations are carried out, usually by computer. Works on the use of classroom activities and experiments in the study and teaching of mathematics are entered under Mathematics laboratories.
--subdivision Data processing under names of individual corporate bodies and under topical headings, e.g. Business--Data processing; Science--Data processing