More likely, he was talking about CP/M, Commodore's C64 or earlier systems, Apple II, or mainframe/midrange terminal systems including Unix since
> it was not until 1984 that IBM PC and clones became the dominant computers [1].
[1]: https://en.m.wikipedia.org/wiki/Influence_of_the_IBM_PC_on_t...
More likely, he was talking about CP/M, Commodore's C64 or earlier systems, Apple II, or mainframe/midrange terminal systems including Unix since
> it was not until 1984 that IBM PC and clones became the dominant computers [1].
[1]: https://en.m.wikipedia.org/wiki/Influence_of_the_IBM_PC_on_t...