Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
An aperture card is
|“||[a]n 80-column tabulating sized card with a hole, or aperture, containing usually one frame of 35-mm microfilm. Generally used for engineering drawings, maps and charts, and x rays.||”|