The SDL Hercules 4.x Hyperion version of the System/370, ESA/390, and z/Architecture Emulator
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Updated
Apr 8, 2026 - C
A mainframe is a powerful computer system designed for processing large data volumes, supporting multiple users & applications. Known for reliability, security, and scalability, they’re vital in industries like finance & insurance. Typical languages include COBOL, PL/I, and Assembly, with Java and Python gaining popularity.
The SDL Hercules 4.x Hyperion version of the System/370, ESA/390, and z/Architecture Emulator
Partial emulator for some model of Sperry Univac 1100 Series mainframe
z/VM Performance Monitor Daemon: zpmd for z/Linux running under z/VM V5.3 on IBM mainframe. It processes and gathers data from DCSS used by Monitor System Service (*MONITOR). Records are written to MySQL database.
Hercules Tape Robot
Unix-like virtual file system for MVS 3.8j