http://www.safaribooksonline.com/ Safari Books Online has a large number of computer technical books available by pre-paid subscription online. The web-site may NOT be accessible 24x7x365 due to their close financial relationships to major universities offering their online books as part of the university's library collection. I.e. the Safari Books MAY be accessible only by way of the a particular university's library web-site and only available during an active quarter or semester term. (Detailed feedback on these attributes is requested that can be added to this web-site.)