While many of the open access texts available on the Internet are also public domain, many authors and publishers have released full or partial versions of current works. For some this is an advertising method to create demand for print versions, while others are more interested in presenting their content to the widest possible audience.
The links have been divided into three categories:
The Online Books Page from UPenn is the most extensive single collection and the University of Montana Open Textbook Catalog is one of the most comprehensive textbook searches:
These collections cover many subjects at a variety of levels.
Collections limited to a specific subject or subjects. Also check the textbook links below.
Conference proceedings are awkward and expensive to publish, and generally there is only a small audience. Internet publishing has allowed conference sponsors and authors to present materials at a much lower cost and at the same time reach a wider audience. Note: Even when you find the "full text" of a conference paper, it may be only the abstract as published in the conference program. Contacting the author(s) may be the only way to get more information.
Unfortunately, there are no centralized databases of online conference proceedings. An organization will generally have a link on their website to proceedings, often under Publications or Conferences. Search for organization websites in any web search engine.
A few subject oriented sites:
To identify conferences of interest in your subject try:
Not all conferences publish any proceedings, and some, especially from large organizations like IEEE (SCSU subscription), publish only in print or online via paid subscriptions. Sometimes doing an Internet search for the author and paper title will turn up an author's site or presentation from a conference.