-- See Also the narrower term Computers Here are entered works on modern electronic computers first developed after 1945. Works on present-day calculators, as well as on calculators and mechanical computers of pre-1945 vintage, are entered under Calculators. --headings beginning with the word Computer
--subdivision Communication systems under types of industries, institutions, installations, names of disciplines, and individual corporate bodies, e.g. Aeronautics--Communication systems; Electric power systems--Communication systems