Dave’s Disk Doctor Service Ltd was a Limited Company that traded from March 1989 until January 2001 during which it raised nearly £180,000 for many charities. … We were a group of ordinary people with varying levels of computer knowledge and skill who came together … primarily to try to help others who were often in great distress at seemingly losing their work …
Dave Smith’s history of ddds.pdf goes into the deep hardware details of developing data recovery for Amstrad word processors.
I used DDDS once, circa 1994, to convert my partner’s PhD from PCW9256 floppies to PC format. They were quick and cheap, and did the job perfectly. I’ve written about the unexpected response to using a faster machine than an Amstrad PCW here before.