You may be interested in some recollections from the early days of Wang. I ran across this site, put up by Harold Koplow, the microcode programmer for Wang, and father of the Wang Word Processing system.
I had a chance to meet Harold during my trips to Wang, in the 70's. He was as irascible as he is said to be. At the same time he was very open and friendly. When I met him, he was at a bit lower ebb because the VS was starting to eclipse the WPS and OIS systems.
Be sure to look at the THEN and NOW pages for the Bios and Harold's Online Book about Wang.