Maartensz is an alias of a Dutch logical philosopher and
psychologist. He lives in Amsterdam, in the Netherlands and is in his late sixties. He is the writer of the Philosophical Dictionary.
He also maintains a large website at two places, that mirror each other:
Here you find quite a lot
computing and M.E. The last is an acronym for the disease Maarten
has since 1.1.1979. There also are since 2004 my reflections on the news in Nederlog.
These are mostly daily and comprise some 16 MB each year.
The best short surveys,
its contents and its size are the site-map and
directories listing. There also is a Tour of the site
that gives a more comprehensive and detailed version and there is an
system for the site. And the last index of Nederlog (written in English since 2010) is under the last link.