.bmp (Bitmap Image File) The .bmp format, also known as bitmap, is a raster graphics image file format used to store digital images. This format was developed by Microsoft for use on Windows, and it is widely supported on both Windows and macOS systems. BMP files are typically large because they contain a detailed, uncompressed representation of the image data. This format is suitable for storing high-quality digital photos, though it's not as commonly used for web or email due to its large file size compared to formats like JPEG or PNG. Important note: Please translate the text as if it were written by a native English speaker and consider all speech and language features when preparing the final text.

The PGM file format was developed in conjunction with the open-source Netpbm graphics program package. Created by Jef Poskanzer in 1988, PGM was designed to store grayscale images and support bitmap images. This file format is compatible with modern graphics editing software such as Corel PaintShop Pro X4, ACDSee Photo Manager 14, and ACD Systems Canvas 15. Since PGM is a plain text format, it can be easily edited using any text editor, making it resistant to changes that can occur when images are transmitted via email. PGM files are classified into two types, distinguished by magic numbers - P2 and P5, which assist graphics editing software in identifying the data encryption standard.