What was Dr Watson's other occupation?
Other occupation? Dr. Watson was a medical doctor. He looked after patients. As a side line, he worked with Sherlock Holmes and considered himself a good friend.
He was also an accomplished author.
If it is the character that you're referring to, his name is Dr. John H. Watson. If the computer program, I believe it was originally called a Sherlock (though I'm hardly even half sure about that, warn you). Dr. Andrew B. Watson is a NASA scientist. Dr. James D. Watson is famous in the field of DNA. Dr. John B. Watson is famous in the field of psychology.