Lawyer-Wearing-Yarmulka

In class today, the professor was discussing notice provisions in an LLC operating agreement. Then he related a humorous incident- he was representing a partnership that was formed eons ago. A situation arose where notice had to be given ASAP. Problem was, according to partnership agreement, notice could be given via three methods: Registered mail, teletype, or telegram.

Registered mail was too slow, teletype machines haven't been used in decades, and Western Union finally stopped its telegram service last year. After some searching, he finally found some small business in Florida that still sends telegrams. But he still sent and e-mail notifying the partners that the telegram was coming.

At this point a student raises his hand and asks- "I don't want to sound stupid but, what's a telegram"?