This bookmarklet will grab 2 or 3 bits of info from the currently viewed webpage and put them into an 'alert' so you can copy & paste into another document.
It should work in any desktop browser (chrome, firefox, ect.) on any OS but I've only personally tested it in Chrome on Windows.
You can press either enter or escape after copying the text. It doesn't make any difference which one you use.
For example, the above URL points to the bookmarklet entry on Wikipedia. If you used the reference bookmarklet on that page it would return the following: