Title: | Printed Circuit Board Generator, BRM Gate |
Artist: | Ed Lebron |
Date: | 1970 |
Material: | Card stock, polyester film |
Dimensions: | 7⅜ x 3¼ in. (187 x 83 mm) |
Company: | U.S. Dept of the Navy / 3M |
Location: | Washington, D.C., United States |
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. They were used mainly for engineering drawings and are still sometimes used for archival purposes.
