Nice paper. Is there any chance that an MS Word version could be made available so that I can make small updates that are specific to my organization? But if that violates the copyright then I understand.
Excellent work! I agree with the comment that the use of i and j of variables should be avoided altogether (because i and j are used to work with complex numbers) and to start iterators with k. But that's the only fault I find. I've been using a lot of this for years, but there's still some useful new insights here as well.
21 Apr 2012
KEEP is complementary to the "clear" command: it keeps the supplied variables and deletes the rest.