Use the idle time on your computer (Windows, Mac, or Linux) to cure diseases, study global warming, discover pulsars, and do many other types of scientific research
So begins the introduction to the BOINC distributed computing for the University of Berkley.
http://www.youtube.com/watch?v=UNDcMAePKYY
http://boinc.berkeley.edu/
Operation is simple, you download the program and participate in projects that you want, after you have registered.
BOINC will download the strings to be elaborate, and when they are ready to be returned to the server of your project.
http://www.hyper.net/dc-howto.html
I use it since 2007 (except for a few months where i had the pc k.o.), and participate in World Community Grid in the following projects
Help Fight Childhood Cancer
Influenza Antiviral Drug Search
FightAIDS @ Home
Human Proteome Folding - Phase 2
Discovering Dengue Drugs - Together
Help Conquer Cancer
Nutritious Rice for the World
The Clean Energy Project
also contribute with Rosetta @ home.