system software: Those cute little comic strip balloons that pop up wherever your cursor is. They contain helpful, if somewhat limited, information about whichever item on the screen your cursor is pointing at. You turn balloon help on and off by choosing "Show Balloons" or "Hide Balloons" from the Help Menu, which is shown by a balloon containing a question mark. A part of System 7; System 7.5 supplements it with Apple Guide, which provides more in-depth "how do I do this?" kind of help..