- This site welcomes every year over 1 million visitors, originating from around 130 countries
- The original site is online since circa 1997 AD
- It contains pages written in 11 languages
- It was created, is maintained and operated on the UNIX platform
- Pages were written by hand using the Emacs editor
- Most dynamic content is generated using software written in the Python programming language
- Although this site aims at being usable with any browser, the reference browser is Firefox.
- Some external figures from Alexa.
- M.C. Escher works © 2003 Cordon Art - The Netherlands. All rights reserved. Used by permission.
- Some documents were written with LaTeX and translated into HTML using LaTeX2HTML and a modified version of the init script by J.O. Smith.