Title: | Printed Circuit Board Generator, BRM Gate |
Artist: | Ed Lebron |
Date: | 1970 |
Material: | Card stock, celluloid |
Dimensions: | 7⅜ x 3¼ in. (18.7 x 8.4 cm) |
Company: | U.S. Dept of the Navy/3M |
Location: | Washington, DC |
An 80-column card with a cutout to hold a 35 mm microfilm image. The card encoded what we would now call metadata, which allowed documents to be indexed and searched. Used mainly for engineering drawings. Still used for archival purposes.
