tiff (on PC's, tif; Tagged Image File Format

Tagged Image File Format (TIFF) is a graphic image format designed primarily for incorporating images into documents. It is recognized by the extension .tif (MS-DOS, UNIX, and OS/2) or tiff (Macintosh)

URLs:

Usenet Comp.Graphics FAQ files

The TIFF FAQ.

The Unofficial TIFF Homepage

An excellent resource for finding TIFF viewers, converters, etc.

TIFF Image Test Page

Test whether your browser has a helper application to receive TIFF files.

TIFF 6.0 Specification Coverage

The technical details of the TIFF format.

Detail:

TIFF is one of the most popular and flexible of the current public domain file formats. It offers a highly flexible and platform-independent format supported by numerous image processing applications.

TIFF was developed by Aldus and Microsoft Corp. Adobe Systems now holds the copyright for the TIFF specification. TIFF/JPEG, aka TIFF 6.0, is an extension of the Aldus TIFF format.