R2 Explained

R2 may refer to:

• DVD region code 2

, a symbol for the coefficient of determination of a linear regression

• R², the two-dimensional vector space of real numbers in mathematics
• R2 (SEPTA), a regional rail line in Philadelphia, Pennsylvania
• R2 signalling, a family of telephony protocols for line and register signalling
• R-2 rocket
• R2-D2, a character from Star Wars films and books
  • any astromech droid in the Star Wars fictional universe
• BBC Radio 2, a British radio station
• Haplogroup R2 (Y-DNA)
• Orenburg Airlines by IATA code
• Patricio Rey y sus Redonditos de Ricota or R2, an Argentine rock band
• Subaru R2, a vehicle
• TSRTWO or R2, a super computer in Vancouver, BC, Canada
• Windows Server 2003 R2
• R2 an abbreviation to the video game Resistance 2