709 / | HD | ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: MULTIPLE COMPUTER OR PROCESS COORDINATING |
FOR 103 | DF | MULTICOMPUTER DATA TRANSFERRING (395/200.3) {19} |
FOR 107 | DF | .~ Computer conferencing (395/200.34) {3} |
FOR 109 | .~.~ Demand based messaging (395/200.36) |