Most legal secretaries had a Wang on their desk until the late 1980s or early 90s. I first switched from Wang to MS-DOS and WordPerfect 5.1 around 1990.
I have used WordPerfect ever since, though I finally switched to the Windows version in the late 90s and have upgraded to newer versions nearly every year since, mainly for the ever improving MS Word and Adobe pdf conversion functions.
Sometimes I really miss MS-DOS. My computer never crashed and the only programs I ever needed were WordPerfect and Lotus 123. It was kind of a pain though to have to load the programs from 5.25" floppy disks every time I wanted to use one.
Yes, those days were great. Everything from one vendor, the Hardware, the Operating System and the Applications. When there was trouble, no question who to call! They did squeeze customers out of a lot of money though.