signal
A mechanism that UNIX systems use to allow a process to be notified of some event,
typically asynchronous and external. It is a software analog to hardware interrupts.
signal mask
A mask that tells the kernel (or threads library) which signals will be accepted and which
must be put onto a "pending" queue.
SIGSEGV
A signal that is generated by UNIX systems when a user program attempts to access an
address that it has not mapped into its address space.
SIGWAITING
A signal that is implemented in Solaris and used to tell a threaded process that it should
consider creating a new LWP.
SPEC
An organization that creates benchmark programs and monitors their use.
store buffer
A buffer in a CPU that caches writes to main memory, allowing the CPU to run without
waiting for main memory. It is a special case of cache memory.
SVR4
An abbreviation for System Five, Release 4--the merger of several different flavors of
UNIX that was done by Sun and AT&T. SPEC 1170 merges SVR4, POSIX, and BSD--
the main UNIX "flavors"-- to specify a common base for all future UNIX
implementations.
synchronous signal
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