This article describes the lift-and-shift migration of an HP-UX workload to Azure. HP-UX is HP's Unix operating system for PA-RISC workstations and servers. The article shows how emulator software called Charon-PAR from Microsoft partner Stromasys can run HP-UX workloads on Azure.
https://learn.microsoft.com/en-us/azure/architecture/example-scenario/mainframe/hp-ux-stromasys-charon-par