What is obidos?

on amazon.com, all links are like /exec/obidos

[webdevsf]

What the heck is obidos? in this link from amazon.com for example.

http: //www.amazon.com/exec/obidos/ASIN/043935806X/numbers-like-104-0674399-1855938

[1][[b]edited by[/b]: Woz at 5:49 am (utc) on Jan. 16, 2003][/1]
[1][edit reason] de-linked [/edit][/1]

[seindal]

It probably has nothing to do with it, but there are places called Obidos in Portugal and Brazil.

René

[Marcia]

I just checked on some lady writers page, clicked on the affiliate link to her book at Amazon. It was there also - looks like it's just something they do with processing those links.