in which coincidence of markings is sensed optically, e.g. peek-a-boo system

Introduced: September 1968

Last revised: January 2006

Full Title

Information retrieval from punched cards designed for manual use or handling by machine; Apparatus for handling such cards, e.g. marking or correcting > in which coincidence of markings is sensed optically, e.g. peek-a-boo system

Classification Context

Section:: PHYSICS
Class:: COMPUTING OR CALCULATING; COUNTING
Subclass:: GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS

Related Keywords

PEEKABOO cards used for information retrieval