In 1978 – Digital Equipment Corporation (DEC) sent the first unsolicited mass commercial email to 600 west coast ARPANET users. The message informed users of DEC’s new computer and operating system with ARPANET support, the DECSYSTEM-2020 and TOPS-20.
In 1997 – In New York City, Gary Kasparov began his re-match match against IBM’s Deep Blue computer. He had won the previous match in February 1996 4-2.
In 2000 – A “geocache” was hidden outside Beaver Creek, Oregon, kicking off the first “Great American GPS Stash Hunt” and the hobby now called geocaching.