Park learned to program motion-graphics synchronized to dance music and ran a BBS, an electronic bulletin board system, the precursor to the Internet.

CNN: Commodore 64 still loved after all these years

Someone recently forwarded to me an ad that was posted on the electronic bulletin board for parents at a prestigious private school in Manhattan.

FORBES: Harvard Grad Seeks Babysitting Jobs

In addition, Twitter provided an electronic bulletin board for sharing information and insights about everything from the location of bathrooms to ways of finding people amid the wreckage.

FORBES: Twitter Responds to Catastrophe in Japan

Stocks in the Over-The-Counter market are quoted on systems like the OTC Bulletin Board, an electronic quotation system, and the Pink Sheets, which is not registered as a stock exchange and is named for the color of paper on which its listings of price quotes for companies have historically been printed.

FORBES: SEC Shuts Down Trading Of 17 Penny Stocks

This gem, however, traded in a nether region of the investing world called the OTC Bulletin Board, a newly popular electronic service that links marketmakers in the shares of small companies.

FORBES: Under The Counter