The slowest computer I ever owned was a Tandy 1000SL which ran a 'blazing 4-8MHz'
. The nice thing about it was that it used a graphical user interface at a time (1988) when most PCs were DOS command line only (although Windows probably did exist in some primitive state). I used it to type out schoolwork up until about 5 years ago when the printer wore out and I was unable/unwilling to replace it.
Funny thing about that is I still have it set up and use it for playing DOS games
.
Funny thing about that is I still have it set up and use it for playing DOS games