My first computer
It never crashed, the batteries lasted forever, no Spam,Junk or viruses, eminently portable, great picture (depending on how good your eyes were)
not compatible with anything else, cost pennies to buy and the CPU was you!
very popular in its day, every company had one or more, don't laugh I can remember seeing my first one at school, yes I am as old as God's dog and after fighting Microsoft Windows for twenty years I seriously considered going back to the 'Abacus', thank god I was saved by my wonderful Mac Pro.