NFS Services Administrator's Guide

Introduction
ONC Services Overview
Chapter 118
Remote Procedure Call (RPC) is a mechanism that enables a
client application to communicate with a server application. The
NFS protocol uses RPC to communicate between NFS clients and
NFS servers. You can write your own RPC applications using
rpcgen, an RPC compiler that simplifies RPC programming.
Transport-Independent RPC (TI-RPC) is supported on HP-UX 11i v3.
For information on RPC, see rpc (3N) and rpcgen (1). For more
information on RPC and rpcgen, see John Bloomer, Power
Programming with RPC.