Title: | Bibliographic Card |
Date: | c. 1970 |
Material: | Card stock |
Company: | E-Z Sort Systems Ltd. |
Location: | San Francisco |
A card with 4 rows of holes along each edge. Holes on the interior are "notched" by cutting a slot from that hole to the neighboring hole in the direction of the edge. When the needle is inserted, slotted cards drop down by the length of the slot.