Then ask them what operating System it has, and they may tell you Windows, you ask them which version, and most don't have a clue.
When their computer acts up, they what to buy a new one, they almost never repair the old one.
I work for a VERY large business, and a good portion of the employees don't have a clue about whats inside their work PC.
P.S. The backend server is running on OpenVMS, but this is well hidden.
Now, yes. Back in the early '80's when the events that laid the groundwork for where we are to day were being played out, if someone had a home PC, it could very well have been IBM.