Files with im1 extension were used by Sun Microsystems UNIX platforms OS. They were used as a bitmap image file format.
IM1 file extension - Sun raster image
What is im1 file? How to open im1 files?
File type specification:
The im1 file extension was used in the past for one of the many bitmap formats used by Sun. Most likely obsolete.
This file format was used by the Sun Microsystems UNIX platforms using the SunOS operating system.
This im1 file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.