BMP

.BMP or .DIB (device-independent bitmap) is a bitmapped graphics format used internally by the Microsoft Windows graphics subsystem (GDI), and used commonly as a simple graphics file format on that platform.

BMP files are usually not compressed, so they are typically much larger than compressed image file formats for the same image.

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BMP can also stand for the Basic Multilingual Plane, the 16-bit base of the Unicode character set.