As from November 11th Google will launch a so called Shared Endorsements for products or services which will allow them to use your picture when displaying ads to your friends.
You got a .rar file and you don't how to open it, some one asked you to send him "a rar file" or you just need a good archiving software? Download and install WinRAR.
Did you know you can use your camera with Adobe Lightroom to shoot photos and display them directly on your computer screen? It's called shooting in tethered mode.