A bitmap ( BMP ) is a file format used in windows based systems. It is a very basic file, and usually quite small ( due to lack of quality ) in comparison to JPEG files or other more common formats.

Cluster File Systems was created in 2001.

The 3 major file systems are FAT, FAT32 and NTFS

There are several file systems employed by both operating systems, thus you need to be more specific when asking for a comparison. Windows most commonly uses NTFS these days, although older versions used FAT. There are several popular file systems for Linux, depending on usage. The most common is ext3 or ext4, although ext2, ReiserFS, JFS, XFS, and several others all have fairly common usage.

ext2, ext3, ReiserFS, are some native file systems