Most of the commercial electronic journal sites are maintained by the print journals' publishers.
Some publishers also feature multi-title searching.
The article format varies, although most publishers are making the article full text available in PDF format, which is viewed through Adobe Acrobat. The NASA Langley Technical Library is providing access to a number of electronic journals through our home page. Specific search and browse features vary by publisher and by specific journal title. Information on the characteristics of specific publishers' electronic journal features is also available. There are a number of electronic journals available through the World Wide Web that are not restricted to subscribers.