Computer printers for printing documents and parts and fittings therefor; printers which incorporated copier, facsimile and scanning functions in the standalone mode, and parts and fittings therefor; photo-copying machines; mathematical instruments, namely, drafting plotters; time and date stamping machines; time clocks; punched card office machines; voting machines; photographic machines and apparatus, namely, photographic projectors and projection screens; cinematographic machines and appar...