More About Numbers Than You Probably Want to Know

"Numbers' & Numeral systems' history and curiosities"

I like this page, and recommend it to anyone who might agree that it's fun to read a:

• Review of Roman/Etruscan numerals
• Quick run through the Hindu-Arabic number system which brought zero to Europe
  (that's a lot more than nothing!)
• And look at the Ba-Gua trigrams and Genji-Koh patterns