George Stibitz, an engineer from Bell Telephone Labs, demonstrates the first example of "remote computing": Having created his digital "Complex Number Calculator" a year before, he leaves it in New York City and travels to New Hampshire with a teleprinter, where he allows attendees at the American Mathematical Society to enter equations that are transmitted down phone lines, calculated, and the answers returned to what is described as an astounded audience.

Source

http://www.kerryr.net/pioneers/stibitz.htm