RPC services offer a general sense to describe Request / Reply Middleware with basic data-type translation and connection-oriented communication services and can also refer to products that use an Interface Definition Language (IDL) to describe the argument lists for outgoing and incoming parameters.

RPCs can also be included with network operating systems and other network computing environments.  RPCs, or RPC-like functionality, can be embedded in several different products, such as TP Monitors, development and run-time environments, multipurpose Middleware, and application packages.