CompuServe RLE
From Just Solve the File Format Problem
CompuServe RLE is a bi-level image format that was used by the CompuServe on-line service. In some ways, it is the predecessor of GIF.
The image dimensions are either 128×96 or 256×192. Images are RLE-compressed.
Files consist entirely of ASCII characters, though some are control characters.
Identification
Files begin with bytes 0x1B 0x47 0x4D
(128×96) or 0x1B 0x47 0x48
(256×192).
Software
- Netpbm, starting with version 10.48 (cistopbm, pbmtocis)