2480 STAD PAC File Image (Raster) STAD PAC is a raster graphics format developed by Peter Melzer and associated with the STAD (ST Aided Design) graphics application for Atari ST computers. File headers begin with either of two four character sequences (pM85 and pM86) dependent on whether the image data in the file is horizontally or vertically packed. 180 The National Archives and Records Administration / The National Archives and Records Administration 16 Mar 2022 16 Mar 2022 fmt/1653 PUID pac File extension seq File extension 1988 STAD Pac File BOF:'pM' followed by either '35' or '36' 1 Absolute from BOF 0 0 704D38(35|36)