This format is used for storing bitmap images. It supports many different file types and compression algorithms. One Palm bitmap file can contain multiple versions of the same images with different colors. These files are used on PALM devices.
A file with the DOCM file extension is a Word Open XML Macro-Enabled Document file used in Microsoft Word. It was introduced in Microsoft Office 2007. DOCM files are just like DOCX files except that they can execute macros, which lets you automate repetitive tasks in Word.