ANSI X3.21-1967
Rectangular Holes in Twelve-Row Punched Cards

Standard No.

ANSI X3.21-1967

Release Date

1967

Published By

American National Standards Institute （ANSI)

Latest

ANSI X3.21-1967

Scope

Specifies the size and location of rectangular holes in twelve-row 3-1/4 inch wide punched cards.

ANSI X3.21-1967 history

• 1967 ANSI X3.21-1967 Rectangular Holes in Twelve-Row Punched Cards