What does FROG stand for?

Faint Red Outlier Galaxy

Fast RHIC Oscillation Grabber (SAUS)

Finished Room over Garage

Free Ranging on Grid - Computer-controlled transport system

Free Rocket over Ground - USSR missile

Friends of Research and Odd Gadgets (SAUS)

Free flight Range Over Ground (SAUS)

Frogerius - Rogerius Beneventanus - Flourished, 12th century - Authority cited in pre-1607 legal work (DSA)