Japan Air System has stayed loyal to Unisys Corp, giving it a monster $70m contract for the new USAS 2000 system of passenger services software and nine new Unisys mainframes – two large Unisys 2200/633s with Extended Transaction Processing Capacity, seven 2200/400 mainframes, and 18 DCP/50 distributed communications processors; the extended transaction capability multiplies processing capacity by enabling up to four 2200/600 systems to access a single database with record-level locking and by synchronising recovery among hosts; the new machines are not scheduled to go live until the foerth quarter 1992.
