I worked with Wangs back in the day, in BASIC. I remember reading the manual for a customer's machine (2200T? aka "Model T", or maybe 2200VP, aka "2200 very pr

I worked with Wangs back in the day, in BASIC. I remember reading the manual for a customer's machine (2200T? aka "Model T", or maybe 2200VP, aka "2200 very profitable"). The manual indicated that several disk operations were implemented in an extra chip in the new model. Some time later, their machine kind of broke. I experimented and discovered that only the disk operations were not working, everything else was fine. I was pleased as a software engineer to be able to tell the customer, "Call Wang maintenance and tell them the XYZ chip is fried."