The power went out at my daughter’s middle school yesterday just as she was in the computer lab. What to do? The teacher pulled out and dusted off a technology crossword puzzle for them to do. She just showed it to me and was puzzled. 10 across asked: Connects the computer to the telephone. Julia’s answer was obvious, she thought: Skype. No, said the test, the proper answer: Modem. “What’s a modem, Daddy?” she asked.
(See also the comments here about the telegraph.)