Type: Bitmap
    Extension: tif, TIFF
      Version: 6.0
  Compression: Uncompressed, PackBits RLE, LZW, JPEG, CCITT Group 3 & 4
  Color Depth: 24-bits
   Maintainer: Adobe Systems
Specification: ftp://sgi.com/graphics/tiff/TIFF6.ps.Z

The TIFF format was formerly owned and maintained by the Aldus Developer's
Association. Aldus has since merged with Adobe Systems and now the Adobe 
Developers Association (ADA) maintains the TIFF file format. You may obtain a
copy of the TIFF 6.0 specification in PDF format at:

  http://www.adobe.com/supportservice/devrelations/PDFS/TN/TIFF6.pdf

Or from the following FTP site:

  ftp://sgi.com/graphics/tiff/TIFF6.ps.Z
  ftp://ftp.adobe.com//pub/adobe/DeveloperSupport/TechNotes/PDFfiles/

Or in hardcopy from +1.800.831.6395 for a cost of $25US.

A detailed text on TIFF enhancements for Adobe Pagemaker 6.0 is at:

  http://www.adobe.com/supportservice/devrelations/PDFS/TN/TIFFPM6.pdf

You can find the specs for TIFF 4.0 and 5.0 at:

  ftp://ftp.std.com/obi/Standards/Graphics/Formats/tiff.doc.4.0.Z
  ftp://ftp.std.com/obi/Standards/Graphics/Formats/tiff.doc.5.0.Z

General TIFF questions may be asked of the Adobe Developer Support group
at devsup-person@adobe.com.

You may also contact the ADA directly at:

  Adobe Developer Association
  1585 Charleston Road
  P.O. Box 7900
  Mountain View, CA 94039-7900 USA
  Voice: 415-961-4111
  FAX: 415-967.9231
  BBS: 206-623-6984
  FTP: ftp://ftp.adobe.com/
  WWW: http://www.adobe.com/Support/ADA.html

And be sure to visit Niles Ritter's The Unofficial TIFF Home Page at:

  http://www-mipl.jpl.nasa.gov/~ndr/tiff/

Information on the tag extensions of TIFF 6.0 files for storing
geographical bitmap information (GeoTIFF) may be found at:

  http://www-mipl.jpl.nasa.gov/~ndr/cartlab/geotiff/geotiff.html 
  ftp://mtritter.jpl.nasa.gov/pub/geotiff/

And the GeoTIFF FAQ may be found at:

  http://www.mmh.fi/maa/kepa/pos/geotiff/ 

Note: Any software created or modified after 01 January 1995 that supports
the capability of reading and/or writing bitmapped data stored in a TIFF file
and compressed using the LZW algorithm must obtain a patent license agreement
from Unisys Corporation. See Part I of the FAQ for more details on the Unisys
GIF-LZW and TIFF-LZW license agreements.