SDL Tridion 2011 SP1 Documentation
The SDL Tridion 2011 SP1 documentation is available online, you can find the links in the DOWNLOADS - Documentation - SDL Tridion 2011 SP1 section after logging in on SDL Tridion World.
Instructions
Login to SDL Tridion World using the login link on the right-hand menu. If you don't have a valid username and password you can obtain one through your local SDL Tridion Customer Support center. Please see
here
for details.
After logging in you can proceed to the DOWNLOADS - Documentation - SDL Tridion 2011 SP1 section as shown in the picture on the right. From here you can reach the latest 2011 SP1 documentation.