What happened to DR_DOS?

In the early 70's, there was a company known as intergalactic Digital Research. The name was just a little too geeky for even them, and was later shortened to Digital Research. The founder, Gary Kildall, created the first Disk Operating System for Microcomputers called CP/M (Control Program for Microcomputers). This became THE operating system for hobbyist microcomputers. A few years later this changed a bit (or was supplemented) when Steve Jobs and Steve Wozniak designed a home computer that came prebuilt. It was a wild concept for the time, not having to build your computer -- it was a wildly successful idea as well. The micro(home)-computer bloomed from a small little hobby toy, into something that many small businesses wanted and felt they needed. But there was still the other group of CP/M builders and users.