Can you explain? I vaguely recall using it on sparc workstations a couple decades ago, but I wasn't coding for that target. A quick wiki read says it was an AP

Can you explain? I vaguely recall using it on sparc workstations a couple decades ago, but I wasn't coding for that target. A quick wiki read says it was an API framework that was "endian free" and that it trageted the three architectures that next ran on. Was it doing emulation for software using it? Or was it, itself a single binary? Or both?