From PC World:
The site offers downloadable manuals for all kinds of electronics, from calculators and cell phones to TVs and remote controls. The only trick? Finding them.
Retrevo is primarily a shopping portal that’s home to a wealth of product prices and reviews. But it also stores more than 100,000 manuals for more than 1,000 brands.
You can also browse by category or search for a particular product (say, an iPhone). When you find the manual you want, you can download it as a PDF.
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Direct to Retrevo’s User Manual Database