Dr. August
Dvorak, in addition to his highly efficient two-handed keyboard layout, created two single-handed layouts as well. Colonel Robert Allen had lost an arm in
World War II and asked Dr Dvorak to design a keyboard for him so that he could resume his writing. Dvorak created a left-handed and a right-handed keyboard layout. After about 10 weeks of practice, Colonel Allen was able to achieve a speed of about 56 wpm.
The layouts:
right-handed:
`1234jlmfp/
56q.orsuyb;=\
78zaehtdck-
90x,inwvg'
left-handed:
/pfmlj4321
;qbyusro.65=\
-kcdtheaz87
'xgvwni,09