STEP + WORD = PDF
STEP 3D Models can be added to MS-WORD Files to produce 3D PDF interactive documents. By using WORD to author a report, technical document or prepared drawing page specifying the layout, caption and context, then using converting a STEP 3D model file into the document using PDF3D ReportGen, a combined 3D PDF interactive review document can be created. See www.pdf3d.com for more info.