POSIX message queues provide an alternative API for achieving the same result;
see
.BR mq_overview (7).
-.PP
+.P
The System V message queue API consists of the following system calls:
.TP
.BR msgget (2)
POSIX semaphores provide an alternative API for achieving the same result;
see
.BR sem_overview (7).
-.PP
+.P
The System V semaphore API consists of the following system calls:
.TP
.BR semget (2)
(a "segment").
POSIX shared memory is an alternative API for achieving the same result; see
.BR shm_overview (7).
-.PP
+.P
The System V shared memory API consists of the following system calls:
.TP
.BR shmget (2)