I'm sure that I could remember using Microsoft applications where there was a button with a question mark - it would tell you what something on your screen was whenever you first clicked the button and then clicked on the item you were wondering about on the screen.
This lost feature would really help when trying to learn how to use programs like SQL. Questions like how do I get that screen with the code to show back up? - y'know, the screen that I have no idea what it's called!