There are many big web companies that use Hadoop, which is a Java based distributed computing platform (based on Map Reduce). These include Facebook, Yahoo an

There are many big web companies that use Hadoop, which is a Java based distributed computing platform (based on Map Reduce). These include Facebook, Yahoo and Last.fm. Theres an ever growing list at http://wiki.apache.org/hadoop/PoweredBy http://wiki.apache.org/hadoop/PoweredBy