Question on DG/Walkabout/One Sharp models

[Bruce Damer]

Say does anyone on this list know if the Data General Walkabout was 
ever released to the public (ie used outside of DG corporation) and 
what year/month that would have been. The SX model was released but 
what year too? Also was the DG/One released in 1984 and what month then too?

Lastly does anyone know when the Sharp MZ-200 was released?

bruce