Three d dave ( talk) 20:35, (UTC) Ditto that on Olaf Corten. His was one of the first reliable exchanges. Ronz 19:19, 22 October 2007 (UTC) Olaf Corten is not shilling for anyone. This article seems to attract a lot of spam and low-quality links, while the content of the article itself remains almost unchanged. I'd rather have the links hold closely to WP:EL, and encourage editors to add references to the article. If you take out the forum, it all looks like advertising or restricted use. They would have to have other worthwhile content at least. ♫ Bitch and Complain Sooner ♫ 17:49, 22 October 2007 (UTC)PTC USER IS independent indeed I would have guessed at those being the sites most worth keeping, but forums aren't normally linkable, as I read WP:EL. Olaf has a significant prescense, or he did when I was active a few years back, on the PTC/User site. Though it is ad-supported, he does a lot of work with creating benchmarks for computer setups to gauge if a system is working at its potential with Pro/E. Posting this link in "External links" does not constitute SPAM in my opinion. PTC does monitor the threads on PTC/User and I personally have had discussions with PTC employees as a result of questions I have posed. DCDuring 17:05, 22 October 2007 (UTC) PTC/User is billed as "The official user organization for people who use Pro/ENGINEER®, Windchill®, Arbortext®, Mathcad®, ProductView™ and other PTC products." I have been using Pro/ENGINEER for about 11 years and this site is a huge wealth of knowledge, either in their email archives or the many seasoned users who participate on the site.
These are all pretty questionable links per WP:EL, and some look like WP:SPAM- Ronz 15:06, 22 October 2007 (UTC) I have inserted comments on the links, partially to compare with what external links are on other pages. Pro/E & PTC User Community This says it's the "official users group" for ProE.