RC is release candidate
SOFTWARE FURRY giant Microsoft has invited a number of folk to help test the latest build of its constantly futuristic Vista operating system.
This is part of its Vista Beta 2 customer preview programme and it is limiting participation to 100,000 testers. When that number has been reached, this particular phase of the test will be over. A reader invited to test Vista said the download is 2.89GB.
You can also take a look at:
http://www.betaone.net/forum/thread-21562.html