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+=======
+Preface
+=======
+
+This document lists the functions, constant, macros, feature flags,
+and types defined in the POSIX 1003.1 standard.  Each section in
+this document corresponds to a section in the 1003.1 standard
+and the implementation status of the items required by the standard
+are listed.
+
+RTEMS supports a number of POSIX process, user, and group oriented
+routines in what is referred to as a "SUSP" (Single-User, Single
+Process) manner.  RTEMS supports a single process, multithreaded
+POSIX 1003.1b environment.  In a pure world, there would be
+no reason to even include routines like ``getpid()`` when there
+can only be one process.  But providing routines like ``getpid()``
+and making them work in a sensible fashion for an embedded environment
+while not returning ENOSYS (for not implemented) makes it significantly
+easier to port code from a UNIX environment without modifying it.
+
+.. COMMENT: COPYRIGHT (c) 1988-2002.
+
+.. COMMENT: On-Line Applications Research Corporation (OAR).
+
+.. COMMENT: All rights reserved.
+