AFAIK, just about all PDF converters use ghostscript. Ghostscript is <free for non commercial use, with options for commercial use> and is basically a PS interpreter that can output to many raster (bitmap) formats. Since so many printers take PS in, most applications print in PS. So folks who write PDF converters create a PS printer driver and tie in ghostscript to interpret it and output to a PDF file. tim From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Greenberg Sent: Wednesday, February 28, 2007 6:45 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: PDF Writers This is a bit confusing since all PDF generators should create PDF files not PS files, although in reality the two are very closely related. How exactly is the print process being called? Is the "Old" program using it's own print API, or perhaps a 16 bit print call??? Steve Greenberg Thin Client Computing 34522 N. Scottsdale Rd D8453 Scottsdale, AZ 85262 (602) 432-8649 www.thinclient.net steveg@xxxxxxxxxxxxxx _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Waller, Tom Sent: Wednesday, February 28, 2007 1:52 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] PDF Writers I'm working with a customer that has an old scan and view application that worked with Adobe Writer version 4. They recently upgraded to 2003 Server and cannot get Adobe Writer 4 to work with 2003. But when they upgrade to Adobe Writer 7, instead of getting a PDF file (which is what this old app requires) they get a PostScript File. They have tried a few other PDF Writers and seems they are all creating PostScripts instead of PDFs. Anyone know of a 2003 compatible PDF Writer that creates PDF's instead of PostScripts? Or know of a way to make Adobe Writer 7 create a PDF as the default instead of PostScript? Thanks, Tom Waller MTM Technologies, Inc. System Consultant: MCSE, CCEA, CCI, CCIA 135 Main Street, Suite 1040 San Francisco, CA 94105 Learn More at MTM.com <http://www.mtm.com/> _______________________________ The information contained in this electronic transmission, including any and all attachments, is intended solely for use by the individual(s) and/or entity(ies) to whom it is addressed and may contain attorney-privileged and confidential information. If you are not the named addressee, you are hereby notified that any review, dissemination, distribution or copying of this transmission, or any and all attachments, is strictly prohibited. If you have received this transmission in error, please notify the sender by return electronic transmission and destroy any and all paper copies.