In the early 1990's, I was an Alpha and Beta software tester for ARJ Software (PC File Compression Specialists). ARJ Software is in The State of Massachusetts of America, and their Web Link is http://www.arjsoftware.com/. This was not a employement job, but a fun and enjoying hobby, as well as educational. I also helped promote the software in the United States and other Countries, via the Networks and the respective Conferences and file transmissions to and from BBSes (Bulletin Board Systems). The ARJ Archive utility is more than just a compression utility and helps massively in various File handling and manipulation. Check it out, especially if you still work at DOS Levels.
To see the ARJ Help Screen,
Click Here.

I also did some very brief (one-time) testing for Apex Pacific Software (they are in Australia), which was for their software
"DYNAMIC KEYWORD BID MAXIMIZER"..

...and more recently, the Online Bible Software.