When I was getting into computers, we had a variety of companies making different microprocessors. There was Intel, Zilog, Sun, IBM, Motorola, MOS Technology, National Semiconductor, TI, Acorn, HP, and several others.
It seemed that in the home market, at that time made up of Apple, Atari, and Commodore (and a few others), most chips were derived from the Motorola 6800. (the 6502 was a derivative of the 6800). So these were called the "6ers". Their next generation systems were all based on the Motorola 68000 processor and successors.
In the business market, most were first based on the Zilog Z80 (the CP/M machines), later supplanted by the Intel 8088 and follow-on chips. So these were called the "8ers".
Within the Unix workstation world, most started with the more powerful Motorola 68000 before going with a variety of RISC-based processors (Sun SPARC, HP PA-RISC, IBM PowerRISC, etc).
Eventually things shook out, and Intel and Intel-based processors came to dominate pretty much all of the desktop and laptop market and most of the server market (for Windows Servers and Linux Servers). Intel has won out. (please note this is a very simplified version of history)