R* (disambiguation)

R*, R*, or *R can mean the following:

• R*, the symbol for an ecological concept developed by G. David Tilman to explain the minimum concentration to which an organism can reduce a resource. R is the symbol he uses for generic resources, hence R*
• *R and R* may refer to the hyperreal numbers
• Rockstar Games, a games developer most notable for the Grand Theft Auto series, and its subsidiaries
• R Star (disambiguation)