The ACS aperture card scanners automatically digitize drawings from E-Size/A0 to A-size/ A4 stored on aperture cards, and oversizes up to 59"x44", with reduction ratios from 37x to 7.5x. The punched Hollerith code in the cards can be used for automatic drawing size selection and file naming. You select the right resolution - 400, 300, 240, 200, 150, 100, 75 or 50 dpi as measured on the unreduced document to match your requirements and storage capabilities. Vidar aperture card scanners create raster files, with more than 50 formats selectable, compatible with virtually all third party software.