Distributed form systems. How to email a document have it completed and returned.
Word use forms and lock then send.
PDF
http://www.google.com/search?q=make+pdf+form&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7ADBR
http://www.planetpdf.com/forumarchive/92501.asp
http://www.topshareware.com/PDF-Forms-transfer-5204.htm
http://www.adobe.com/products/acrobat/access_book8.html
http://www.cutepdf.com/