Acronyms used in the description of Norsk Data computers. This page lists some of the forgotten acronyms that makes it easier to read ND-documentation.
DMA, Direct Memory Access, allows hardware subsystems to access main memory independent of the CPU.
HDLC, High-Level Data Link Control. Asynchronous serial OSI level 2 protocol supported by several Norsk Data I/O cards.
MPM, Multi Port Memory, a Norsk Data memory subsystem (various revisions) designed for multi-CPU systems like the NORD-50, ND-500, ND-5000.
PIOC, Programmable Input Output Controller, a term used about several Norsk Data I/O cards, e.g. 3108.
SMD, Storage Module Driver, one of the types of disks used by ND computers.
Transaction Processing System, a transaction system handling transactions between I/O devices and programs. See TPS.
TRransaction User Environment, a transaction monitor, network control and recovery system for databases. See TRUE.