Mork

Mork is a Netscape/Mozilla database file format used in various programs. Its use has been replaced by other things (primarily SQLite) in some of the more prominent Mozilla uses these days, but it is still used in the Thunderbird e-mail program.

It is text-based, but not very human-readable. Netscape engineer Jamie Zawinski has called it "...the single most braindamaged file format that I have ever seen in my nineteen year career".

Links

 * Wikipedia article
 * Jamie Zawinski's comments (Bug 241438)
 * Syntax description
 * Perl script to read Mork file