Type: Bitmap
    Extension: PSD
      Version: 3.0
  Compression:
  Color Depth:
   Maintainer: Adobe Systems
Specification:

PSD is the native bitmap file format of the Adobe Photoshop graphical editing
application. PSD files have the extension .PSD under MS Windows and the file
type code 8PBS on the Macintosh.

Other file formats associated with Photoshop include: Arbitrary Map (.AMP),
Brushed (.ABR), Color Table (.ACT), Colors (.ACO), Command Buttens (.ACM),
Curves (.ACV), Duotone Options (.ADO), Halftone Screens (.AHS),
Hue/Saturation (.HSS), Ink Colors Setup (.API), Custom Kerenel (.ACF), Levels
(.ALV), Monitor Setup (.AMS), Replace Color/Color Range (.AXT), Scratch Area
(.ASR), Selective Color (.ASV), Separation Setup (.ASP), Separation Tables
(.AST), and Transfer Function (.ATF). 

The format specification for PSD 2.5 and other file formats associated
with Adobe Photoshop may be found in the document PSAPIDOC.*
(distributed in the Microsoft Write, Macintosh MacWrite, and Adobe
Acrobat format) under the heading "Document File Formats".
These documents are part of the Photoshop Plug-In Software Developers
Kit, available via FTP and from the Adobe Developers Association's
home page:

  http://www.adobe.com/Support/ADA.html
  ftp://ftp.adobe.com/pub/adobe/Applications/Photoshop/*/Plug-In-SDK/

This SDK is also available directly from Adobe (see the PostScript section
for information on how to contact Adobe Systems, Inc.).

The specification for the Adobe Photoshop Raw File Format may be found at:

  http://www.adobe.com/supportservice/custsupport/SOLUTIONS/25c6.htm