Most computer users have made a screen-shot or at least seen a screen-shot made by someone else by this time I would think. Its a great way to share things seen on a computer monitor that might not be reproducible on another computer such as an error dialog, view of current project, or a frozen frame from a movie or animation etc.
I had been spoiled and didn't realize it until dealing with Windows 7 and screen-shots. It was after getting a trojan warning from AVG, I decided to take a screen-shot of the error. Never having done this before on a Windows machine, I had to research it in the Windows 'Help' files.
Great! It's just a simple, single keyboard button press to create the screen-shot. Nice I thought. Wait, where did the screen-shot go? I can't find it on my desktop. Its not in my 'Documents' folder nor 'Pictures' folder on Windows 7. Let's look at those instructions again. What? I have to use a graphics program to copy the screen-shot from the clipboard and paste into a new document just to save it to my desktop? Are they serious?
Dear Windows developers, on every version of OSX on the Mac, I only need a three-button keystroke to produce a screen-shot that lands as graphics file of my choice format, on my desktop. No additional program needed. OSX scores a win here vs. Windows.