IBM A21-9012-3 1231 opticalRdr 1963 free download

File name A21-9012-3_1231_opticalRdr_1963.pdf

File No. 1231 -03 Form A21-9012-3 Systems Reference Library IBM 1231, 1232 Optical Mark Page Readers This publication describes the functions, controls, principles of operation, data flow, and programming for the IB~1 1231 and 1232 Uptical ~1ark Page Readers. Special features available are explained. Also included is a section on the IBM 534 Model 3 Card Punch. This publication, form A21-9012-3, replaces and obsoletes form A21-9012-2. Information from technical newsletter N21-OO23 is included. Changes to text are indicated by a vertical line to the left of the column. Changes to illustrations are indicated by a bullet (.) to the left of the figure title. Copies of this and other IBM publications can be obtained through IBM Branch Offices. Address comments concerning the content of this publication to: IBM, Product Publications Department. Rochester. Minn. 55901.