What's a DE? Also did they tell you what the program did? Other systems that will run or automatically translate > 30 yr old binaries: - I believe IBM i on PO

What's a DE? Also did they tell you what the program did? Other systems that will run or automatically translate > 30 yr old binaries: - I believe IBM i on POWER {i5/AS400} will run stuff from System 38 (1980). - HPE Nonstop (aka Tandem Guardian ) on X86-64 will run or translate binaries from the original proprietary TNS systems (late 1970s) and MIPS systems (1991).