Professional and Technical

Audio Classics - Sells recorded CD's and tapes about historical discussions of philosophy, science, economics, political, religion and ethics. Narrations are by well-known personalities. Page includes list of products and listening samples.
http://www.audioclassics.net/

ManualsRus - Manuals for current and older cameras available in PDF, CD-rom, or print.
http://www.manualsrus.com/

Y-Times Publications LLC - Resources for Yahoo! Store Owners. Includes information on templates, resources and ebooks.
http://www.ytimes.info/

Engineering - Engineers, plant operators and equipment maintainers may find these ebooks and CD's useful.
http://www.bin95.com/ebooks/

InformIT - Daily technical articles, tutorials, interviews, discussions, and online books. Associated with Pearson Education.
http://www.informit.com/

The Rookie Freelance Job Guide - Learn how to find freelance work right away while minimizing the risk and challenges that face newcomers to the freelance marketplace.
http://www.rookiefreelancejobguide.com/

eFlightManuals - Provides flight manuals for military and commercial aircraft. [CD]
http://www.eflightmanuals.com

How to Become a Technical Writer - E-book by Susan Bilheimer. Includes sample chapter.
http://www.becomeatechnicalwriter.com/

PDF-Zoo - Technical manuals for security, fire alarm, and communications industry.
http://www.pdf-zoo.com

DA Information Services - Academic, professional, technical ebooks covering all sciences and humanities, in Mobipocket, Microsoft, Acrobat formats.
http://www.dadirect.com.au/

ASM Service Manuals - Service manuals and schematics , training manuals and consulting about consumer problems.
http://www.asm-service-manual.com