Hercules is a computer emulator which allows software designed for IBM mainframe computers (System/370, System/390, and zSeries/System z) and for plug-compatible mainframes (such as Amdahl machines) to run on other types of computer hardware: notably on low-cost personal computers.
Hercules is an open source software implementation of the mainframe System/370 and ESA/390 architectures, in addition to the new 64-bit z/Architecture. Hercules runs under Linux, Windows (98, NT, 2000, and XP), Solaris, FreeBSD, and Mac OS X (10.3 and later).
Multiple Virtual Storage, more commonly called MVS, was the most commonly used operating system on the System/370 and System/390 IBM mainframe computers. It was developed by IBM, but is unrelated to IBM’s other mainframe operating systems, e.g., VSE, VM.
Assembler G (Waterloo)
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SLAC Modified Link-Editor