System and method of providing an automatic back-up primary terminal for a cluster of secondary terminals

摘要: A system and method for providing an automatic back-up primary terminal a cluster of secondary terminals. The the are coupled over communications network to terminals so that data from is received simultaneously at both Either or can function as active provider services When either one becomes inoperative, control automatically switched other which services. keeps log file (on disc file) special be "backed up" transferred when operative again. data, in embodiment described, related price look-up inventory totals associated with retail