High Quality Content by WIKIPEDIA articles! The IBM 740 CRT Recorder was announced in 1954 and used with the IBM 701, IBM 704, and IBM 709 computers to draw vector graphics images on 35 mm photographic film (i.e. microfilm). The 740 film recorder contained digital to analog converters and a 7 inch, high precision, electrostatic CRT. The raster size was 1024 by 1024, but only 256 resolved spots could be displayed on an axis line. The CRT used a short persistence P11 phosphor. Film was stored in a magazine that could hold up to 100 feet and could be advanced under computer control. ASA 200 speed film was recommended.