I have a spelling checker,
It came with my PC;
It plainly marques four my revue
Mistakes I cannot sea.
I've run this poem threw it
I'm sure your pleased too no,
Its letter perfect in it's weigh
My chequer tolled me sew.

William M. Bulkeley, “PC Dictionaries, Full of Features, Win More Users,”  Wall Street Journal August 4 1992, B1.