Sun Raster was a raster graphics file format used on SunOS by Sun Microsystems.
[1] The format has no MIME type,[2] it is specified in @(#)rasterfile.h 1.11 89/08/21 SMI.
[3][4] ACDSee, FFmpeg, GIMP, ImageMagick, IrfanView, LibreOffice, Netpbm, PaintShop Pro, PMView, and XnView among others support Sun Raster image files.
In version 2.1.4 FFmpeg could encode and decode Sun Raster pixel formats bgr24, pal8, gray, and monow.
The plain text Sun icon format specified in @(#)icon_load.h 10.5 89/09/05 SMI is unrelated to the Sun Raster format.