R13

R13 or R-XIII may refer to:

R-13 (missile), a 1955 Soviet missile system
R13: Extremely flammable liquefied gas, a risk phrase
Lublin R-XIII, a 1931 Polish army-cooperation plane
USS R-13 (SS-90), a U.S. Navy submarine
ROT13, a simple cipher
Chlorotrifluoromethane, a refrigerant
a thermal insulating value, see R-value (insulation)
a Buffet R13 clarinet

This disambiguation page lists articles associated with the same title formed as a letter-number combination.
If an internal link led you here, you may wish to change the link to point directly to the intended article.