NLM PubMed Help - Official help of PubMed. NLM PubMed Online Tutorial - Web-based learning program that will show how to search PubMed. Developed by National Library of Medicine (NLM). Updated October 2002. Ovid Manual - Advanced Journal Literature Search Tutorial Instructions. Louis Calder Memorial Library - University of Miami School of Medicine. Ovid Documentation for Users - Provides basic "how-to" information for Ovid users on getting the most out of Ovid full text and database products. Ovid Web Gateway Tutorial - A user guide to the basic commands needed for the databases that use the software developed by Madison Health Sciences Libraries, University of Wisconsin-Madison. PubMed Tutorial - Developed by Health Sciences Library System, University of Pittsburgh.