US Sprint Communications Co is to market Electronic Data Interchange systems to large-scale network service providers worldwide, and suggests that its service can be used by PTTs to offer public Data Interchange services in their countries, as they use US Sprint Telenet data network systems to provide their own public network services: the system system supports all major EDI protocols and mainframe, mini and personal computer interconnection capabilities; major companies can interconnect the personal computers of their trading partners onto a corporate EDI network via a fully functional MS-DOS package they can install themselves; the system is based on Tandem Computers Inc machines and the core software was developed by Harbinger*EDI Services Inc, of Atlanta, Georgia.