<<Hello ! I need to write a socket program under the existing TCP/IP protocol on an HP/3000 MPE. Did anybody do anything like this? I want to use this to send messages back and forth from a PC to a HP3000 application.>> HP3000 NetIPC sockets talk to PC sockets great. So do Berkeley sockets. NetIPC sockets are somewhat more flexible, whereas the BSD-style sockets are faster to get up if you're porting existing BSD-type code. <<What manual deals with this?>> "NetIPC 300/XL Programmer's Reference Manual", 36920-61005. "Berkeley Sockets/iX Reference Manual", 32650-90372. <<What else can I read?>> Can't think of anything offhand that would be specific to the HP end. Most BSD-oriented socket books/manuals would be applicable for BSD-type sockets. <<Does anybody have sample code? Any help, hints, points will be greatly appreciated. Thanks!>> I have sources for NetIPC stuff in C. Steve Dirickson WestWin Consulting (360) 598-6111 [log in to unmask]