Patrick: We use EDI for a couple of our larger customers. The way we do it is to use a PC for the data comm to our VAN and then upload the data to the HP3K where a custom program interfaces the data to our system. Everytime we get a new EDI trading partner we shell out $150.00 for a new EDI overlay from our EDI software company. This is because, while EDI is standardized, each company can customize their EDI data interchange layout. Or maybe it's because our EDI software supplier likes milking its customers. Regardless, we end up paying. If you want details, I'd be glad to email you privately. Jim Phillips Manager of Information Systems E-Mail: [log in to unmask] Therm-O-Link, Inc. Phone: (330) 527-2124 P. O. Box 285 Fax: (330) 527-2123 Garrettsville, Ohio 44231