Most recent
INCITS 21-1967 (S2017)
Rectangular Holes in Twelve-Row Punched Cards
Specifies the size and location of rectangular holes in twelve-row 3-1/4 inch wide punched cards.
InterNational Committee for Information Technology Standards [incits]
Specifies the size and location of rectangular holes in twelve-row 3-1/4 inch wide punched cards.