-> I used to own a rather odd IBM typewriter (IBM Executive). It used a
-> *proportional* font!! And had a split space bar. One half did an "en"
-> space the other did an "em" space (2 & 3
"units" respectively).

 I recieved an Odd Computer Keyboard with one Donation .The space baw
was dividedc like you are talking about except the Left Side was
"Backspace" and the Right side was "Space"
That one went to the landfill along with another one with a big hump in
the middle. 
Something about "Teaching Old Dogs new Tricks".  :-)  :_)
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