tpns

Teleprocessing Network Simulator (TPNS) is an IBM licensed program, first released in 1976 as a test automation tool to simulate the end-user activity of network terminal(s) to a mainframe computer system, for functional testing, regression testing, system testing, capacity management, benchmarking and stress testing.
In 2002, IBM re-packaged TPNS and released
Workload Simulator for z/OS and S/390 (WSim) as a successor product.

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