Prosoft Engineering was created in 1985.
Prosoft Engineering claims to be the most awarded and most used data recovery software. I am not personally sure of this claim but I never used such software myself. It would be wise to contact a professional on the matter as the most used software may not always be the best. But to answer the question, Prosoft Engineering appears to be the most used.
ProSoft Technology Inc offer connectivity solutions that enable the linking of dissimilar automation products. They also provide field proven connectivity and communication solutions.
A good site to learn how to use Data Rescue II is the website Prosoft Engineering Inc. The company sells the product, but they have a support section as well as a FAQ section that give good insite.
Commonwealth Engineering was created in 1946.
Moxy Engineering was created in 1969.
ST Engineering was created in 1967.
Cosmos Engineering was created in 1918.
Expedition Engineering was created in 1999.
Wisconsin Engineering was created in 1992.
Lift Engineering was created in 1965.
Mannvit Engineering was created in 1963.
When Engineering Fails was created in 1998.