This document is the Final Technical Report under DARPA contract MDA903-85-C-0130, entitled Continued Development of Internet Protocols under the IBM OS/MVS Operating System. Under this contract, the contractor continued the development and distribution of network software for the DoD Internet protocols, to execute on an IBM 370 mainframe under the OS/MVS operating system. The central component of this network software is a subsystem called the ARPANET Control Program or ACP. This report covers the major areas of development of the ACP under this contract: revision of the Local Network Interface, the introduction of name resolver code, and the use of the C language within the ACP. Finally, it summarizes the most important features of the latest ACP distribution, Release 1.6, and lists areas for future ACP development. (Author).