how is this doc inside browser achieved?

Question

http://www.docstoc.com/docs/356624/Code-Reuse-in-Object-Oriented-Software-Development

Answer 1

With the Adobe Flash Player.

Answer 2

Check out Scribd (http://www.scribd.com) if you're interested in quickly having something like this on your site.

Answer 3

More specifically it looks to be Adobe FlashPaper, a technology built on Flash that gives you a kind of embeddable PDF, but without using iframes. Apart from exact layout capabilities, the major advantage is printing.