PGP, an acronym for Pretty Good Privacy, was originally created as a free tool by Philip Zimmermann in the early nineties to allow for private email correspondences and bulletin-board service postings.

FORBES: Symantec Acquires Encryption Provider PGP For $300 Million

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

Posted on the community bulletin board, by bingo announcements, are alerts about the postal service's recent proposal to pull out of federal health plans and run its own less-costly one an idea that has retirees anxious about their benefits.

WSJ: In Florida, These Retirees Deliver a First-Class Protest