BitMaP, noncompressed image file format frequent in the Microsoft Windows community. 1..8 bits per pixel.
[anyone have a web address for info on bmp format?]
RS has http://google.com that can bring forth many, in this case for "bmp format description":
[strimj segmentation has a reader strimj::fromBMP2 for binary .BMP files (1 bit per pixel).
In the 1980s, XBM files in the Unix/X-world also often had the .bmp extension, but this is a whole different format, text files in C syntax to describe binary images as sort of a hexdump.