LKSoft websites
www.lksoft.com - LKSoftWare GmbH website.
www.ida-step.net - IDA-STEP products website.
www.jsdai.net - website of JSDAI, STEP API created by LKSoft.
www.ap210.org - STEP for Electronics.
STEP info
www.wikipedia.org - STEP on Wikipedia.
www.wikiSTEP.org - tutorial, overview and implementation information on STEP.
Other
pdesinc.aticorp.org - PDES, Inc. consortium.
www.tc184-sc4.org - Technical Committee TC 184/SC 4.