Description: BUY 2 get 1 FREE ( for every 2 you buy get 1 extra FREE ) IBM 80 Column SQUARE corners DATA Key-Punch Cards (Hollerith) You are bidding one VINTAGE IBM (Hollerith) punch card. Since punch cards were used in the 1890 census, virtually all punch cards had square corners, until IBM changed to rounded corners in 1964. My cards have SQUARE corners. I originally purchased In bulk 2000 per box, in the early 1970's. The cards have never been used, or for that matter out of the original box. These are clean, unused, and show absolutely no visible signs of aging. IBM (Hollerith) punch cards 80 columns of 12 positions (0-9 + 2 zone) IBM cards are exactly 7 3/8 by 3 1/4 inches and 0.007 inches thick. FORTRAN program statements had this format: Column 1 – Comment - usually marked with a “C” Column 1-5 - Line Number – usually used with format statements Column 6 - Continuation of statement on previous card Column 7-72 - the actual FORTRAN code ( latter systems used 7-80 ) Column 72-80 – Sequence or Identification number When cards were to hold data, the format was free form. TERMS: * Shipping is First Class letter without tracking. First Class with tracking and Priority Mail options are available. * PayPal within 72 hours
Price: 0.99 USD
Location: Schwenksville, Pennsylvania
End Time: 2024-09-16T21:27:05.000Z
Shipping Cost: 1 USD
Product Images
Item Specifics
Restocking Fee: 10%
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Compatible with: Keypunch
Input Device: Card Reader
Modified Item: No
Country/Region of Manufacture: United States
Custom Bundle: No
Printer: Card Interpreter
MPN: AAI-5081
Brand: AAI
