Paradox
A relational database for Microsoft Windows, originally from Borland.
Paradox 5 ran on Microsoft Windows [version?] and provided a graphical environment, a debugger, a data modelling tool, and many "ObjectPAL" commands.
Paradox 7 ran under Windows 95 and Windows NT.
http://corel.com/paradox9/index.htm.
[Update?]
paradox
An apparently sound argument leading to a contradiction.
Some famous examples are Russell's paradox and the liar paradox. Most paradoxes stem from some kind of self-reference.