Glossary 453
object reference An object identifier in CORBA. (Section 6.4.1)
object request broker A CORBA component that manages the
communication between clients and objects. (Section 6.4.1)
operator fusion A technique for instruction set design by combining smaller
operations into a single instruction. (Section 2.9.2)
OR-activation An OR-like combination of events. (Section 6.3.2)
ORB See object request broker.
OSI model A model for levels of abstraction in networks. (Section 1.2.1)
overhead In operating systems, the CPU time required for the operating
system to switch contexts. (Section 4.2.2)
P() Traditional name for the procedure that takes a semaphore.
packet In VLIW processors, a set of instructions that can be executed
together. (Section 2.4.1) ...