This format is applied in universal vector graphics in Windows applications. It’s used to store collections of graphical drawings. It stores data in the RGB range, not supporting the CMYK system. It can be used as the graphics language for a printer driver. It has a 16-bit structure.
PGM is a storage format for grayscale images. Files in this format can be opened using software: ACDSee Photo Manager 14, ACD Systems Canvas 15, Corel PaintShop Pro X4. This type of file can be edited with a text editor. PGM files can be in two versions: P2 / P5. P2 are readable, P5 - to binary formats.