Perforated tape reader
Personal authority verification system
Photoelectric punched card reading device
Photoelectric scanning systems for reading data appearing in an
Point-of-action billing transactor
Polynomial calculator device, and method therefor
Polyphase scanner for bar code symbols
Process and apparatus for controlling document feeding machines
Product processing system with price printer
Programable data entry system
Programmable card actuated lock
Programmable digital/analog memory system
Programming apparatus
Pulse width detection circuit for electro-optical label reading