Programmable digital/analog memory system
Programming apparatus
Pulse width detection circuit for electro-optical label reading
Read only memory
Read-write head back-up member
Reading device for optically detectable digital codes
Receipt validating bank depository
Recording device
Replaceable passenger tabulating and recording card reader unit
Sales computer utilizing sensor pairs
Secret number change routine
Secure property document and method of manufacture
Security cards
Security means for transaction terminal system
Self service postal apparatus and method
Self-cleaning label for automatic object identification system
Self-clocking punched record reader
Semiconductor wafer having machine readable indicies
Sensing rod for the manual scanning of graphic information
Signal processor method and apparatus