Table of Contents
Numbering Your Punch Cards With A Pencil In Case You Drop Your Program
| Field | Computing |
| Went Obsolete | Seventies |
| Made Obsolete By | Magnetic tapes and floppy drives |
| Knowledge Assumed | None |
| When useful | Wherever loose cards or papers have to be kept in order. |
One could also draw one or several diagonal lines across the top of the deck of punched cards, which showed at a glance if the deck had been randomized, and let you put it back in order; quicker than numbering one by one..
One never numered the cards by pencil. If you ever inserted/deleted cards in the deck (e.g “edited” it), that would invalidate the numbering. Instead, the above technique or run the deck through a card punch(approve sites) set to automatically number in columns 73-80.
