R²

(Reality Regenerator) A picture improvement system producing clear and natural images on your TV screen. The edges of objects, which may be blurred after recording, are restored by the system.
Found on http://www.sony.co.uk/glossary/ShowGlossary.action?site=odw_en_GB§ionty

RA2

ISO paper size 430 x 610mm.
Found on http://www.tso.co.uk/solutions/publishingsolutions/printproduction/printglo

ra2

red alert 2 (game)
Found on http://www.noslang.com/dictionary/r/
No exact match found