STN User Guides provide detailed descriptions of specific STN features or functions. Examples are used throughout the guides to show you the exact STN interaction. All STN User Guides below are in PDF format and listed in alphabetical order. The availability in PDF requires Adobe Acrobat Reader. Please download this currently free software.

• Derwent GENESEQ User Guide (an Introduction) (09/00)
• Derwent World Patents Index - STN online user guide (5/06)
• MARPAT User Guide (~207K) (3/97)
• MEDLINE Searching MeSH User Aid (this document is being updated)
• NAPRALERT Classification Codes (~298K) (6/93)
• STN Express with Discover! User Guide - Analysis Edition, see STN Express main page
• Patent Coverage in Chemical Abstracts - country, kind, and timeframe coverage of patents
• Patent Information from CAS (~240K) (12/02)
  emphasizes the selection, coverage and content of patent documents in the CAS database from 1907 to the present
• Polymer Class Terms in the Registry File (~65K) (1/93)
• STNindex User Guide (~91K) (3/96)