Another example of stack machines was the original Tandem architecture, which was based on HP 3000. (Most of the early Tandem team had come from HP.) Tandem then moved away from stack machines, to MIPS – but like the HP-3000 RISC transition, the MIPS Tandems had an emulator/translator for the original stack machine architecture.

From MIPS, Tandem moved to Itanium, and now to x86. And, having been founded by ex-HP engineers, Tandem is now part of HPE.