DOS/360/RJE (DOS/360 with a control program extension that provided for the monitoring of remote job entry hardware (card reader & printer) connected by dedicated phone lines) DOS/VS (First DOS offered on System/370 systems, provided virtual storage) DOS/VSE (also known as VSE, upgrade of DOS/VS, up to 14 fixed size processing partitions ) VSE/Advanced Functions (VSE/AF) - Additional functionality for DOS/VSE VSE/SP (program product including DOS/VSE and VSE/AF) VSE/ESA, replaces VSE/SP, supports ESA/370 and ESA/390 with 31-bit addresses z/VSE (latest version of the four decades old DOS lineage, supports 64-bit addresses, multiprocessing, multiprogramming, SNA, TCP/IP, and some virtual machine features in support of Linux workloads) CP/CMS (Control Program/Cambridge Monitor System) and successors on IBM S/360, S/370, and successor mainframes CP-40/CMS (for System/360 Model 40) CP-67/CMS (for System/360 Model 67) Virtual Machine Facility/370 (VM/370) - the CP virtual machine hypervisor, Conversational Monitor System (CMS) operating system and supporting facilities for System/370 (24-bit addresses) VM/370 Basic System Extensions Program Product (VM/BSE, AKA BSEPP) is an enhancement to VM/370 VM/370 System Extensions Program Product (VM/SE, AKA SEPP) is an enhancement to VM/370 that includes the facilities of VM/BSE Virtual Machine/System Product (VM/SP) replaces VM/370, VM/BSE and VM/SE. Virtual Machine/Extended Architecture (VM/XA) refers to three versions of VM that support System/370 Extended Architecture (S/370-XA) with 31-bit virtual addresses Virtual Machine/Extended architecture Migration Aid (VM/XA MA) - Intended for MVS/370 to MVS/XA migration Virtual Machine/Extended Architecture Systems Facility (VM/XA SF) - new release of VM/XA MA with additional functionality Virtual Machine/Extended Architecture System Product (VM/XA SP) - Replaces VM/SP, VM/SP HPO and VM/XA SF VM/ESA (Virtual Machine/Enterprise Systems Architecture, supports S/370, ESA/370 and ESA/390) z/VM (z/Architecture version of the VM OS with 64-bit addressing) TPF Line (Transaction Processing Facility) on IBM S/360, S/370, and successor mainframes (largely used by airlines) ACP (Airline Control Program) TPF (Transaction Processing Facility) z/TPF (z/Architecture extension) Unix-like on IBM S/360, S/370, and successor mainframes AIX/370 (IBM's Advanced Interactive eXecutive, a System V Unix version) AIX/ESA (IBM's Advanced Interactive eXecutive, a System V Unix version) OpenSolaris for System z UTS (developed by Amdahl) Linux on IBM Z Others on IBM S/360, S/370, and successor mainframes: BOS/360 (Basic Operating System) Distributed Processing Programming Executive/370 (DPPX/370) a port of DDPX from 8100 to S/370. MTS (Michigan Terminal System, developed by a group of universities in the US, Canada, and the UK for the IBM System/360 Model 67, System/370 series, and compatible mainframes) RTOS/360 (IBM's