The 'original' site mentioned by CaptnPea has no relation to this site, therefore it is not the 'original' site of mcadcentral. proecentral is the original site of mcadcentral.
www.ptcuser.org is an independent site run by the PTC User Group and it also has an e-mail exploder.
www.ptcuser.org is an independent site run by the PTC User Group and it also has an e-mail exploder.