This IsNot Serious
By ColmSmyth on Nov 19, 2004
Some days, Slashdot rules: the follow-ups to MS has patented BASIC's IsNot operator" are laugh-out-loud funny [the first link in the initial post will take you to the patent].
Some times, patents != intellectual property; patents := joke.
BTW, if you are really curious, you can find out the "rationale" for IsNot; it's actually syntactic sugar to accompany some syntactic sugar to work around some syntactic sugar in VBA; I kid you not...