There used to be stories about small manufacturing companies that bought AS/400s in the early 1990s, installed them in their factories, then at some point there

There used to be stories about small manufacturing companies that bought AS/400s in the early 1990s, installed them in their factories, then at some point there was construction and walls were built around them, and then they were discovered 20+ years later, still running, when they were upgrading their production lines and trying to figure out what was actually running them.