It&#x27;s neat to imagine an alternate history where z80 CP&#x2F;M machines &#x27;won&#x27; the 80s PC wars, and Gary Kildall and DRI became the rich and deservedly powerful software house of the 80s and 90s, instead of Gates&#x2F;Microsoft; with ascendancy for GEM and a multitasking multiuser CP&#x2F;M instead of Windows and MS-DOS.