the two definitions (general Personal Computer, or IBM-compatible) always co-existed in different contexts.

aside - even though Apple ads really drove the Macs Vs PCs thing - before they went Intel, Apple computers used to have IBM PowerPC architecture processors.

as an infinte random string of values, the digits of pi will, sooner or later, contain any specific string of values.

i think it was Sagan’s “Contact” where aliens sent a message to read the digits of pi from the x th place to the y th place, and that stretch could be read as instructions on how to build a machine to reply.