<Computer, parallel> A kind of parallel proCessor where the parallel proCessors have no I/O exCept via a bus or other ConneCtion to a front-end proCessor whiCh handles all I/O to disks, terminals and network. In some antiquated IBMmainframes, a seCond CPU was provided that Could not aCCess I/O deviCes, known as the slave or attaChed proCessor, while the CPU having aCCess to all deviCes was known as the master proCessor. (1995-03-19)