NOVELTY - Composition comprises: hydrofluorocarbon (HFC)-1234yf (2,3,3,3-tetrafluoropropene); and at least one compound e.g. HFC-152a (1,1-difluoroethane) (preferred), HFC-1234ye (1,2,3,3-tetrafluoropropene), HFC-1243zf (3,3,3-trifluoropropene), HFC-32 (difluoromethane), HFC-125 (pentafluoroethane), HFC-134 (1,1,2,2-tetrafluoroethane), HFC-134a (1,1,1,2-tetrafluoroethane), HFC-143a (1,1,1-trifluoroethane), HFC-161 (fluoroethane), HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane), HFC-236ea (1,1,1,2,3,3-hexafluoropropane), HFC-236fa (1,1,1,3,3,3-hexafluoroethane) and HFC-245fa (1,1,1,3,3-pentafluoropropane).    USE - The composition is useful: for producing cooling or heat; for replacing the high GWP refrigerant in the refrigeration, air-conditioning or heat pump apparatus including a stationary air-conditioning system, a stationary heat pump system or a stationary refrigeration system; as a heat transfer fluid; for forming foam; for producing aerosol products (all claimed); and as fire suppression and fire extinguishing agents.    ADVANTAGE - The composition: is azeotropic or near-azeotropic composition and does not fractionate upon leakage from the refrigeration or air conditioning system; has zero or low ozone depletion potential and low global warming potential, thus environmentally friendly; and utilizes the compatibilizer that improves the oil-return to the compressor in the refrigeration, air-conditioning or heat pump apparatus.    DETAILED DESCRIPTION - Composition comprises: hydrofluorocarbon (HFC)-1234yf (2,3,3,3-tetrafluoropropene); and at least one compound including HFC-152a (1,1-difluoroethane) (preferred), HFC-1234ye (1,2,3,3-tetrafluoropropene), HFC-1243zf (3,3,3-trifluoropropene), HFC-32 (difluoromethane), HFC-125 (pentafluoroethane), HFC-134 (1,1,2,2-tetrafluoroethane), HFC-134a (1,1,1,2-tetrafluoroethane), HFC-143a (1,1,1-trifluoroethane), HFC-161 (fluoroethane), HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane), HFC-236ea (1,1,1,2,3,3-hexafluoropropane), HFC-236fa (1,1,1,3,3,3-hexafluoroethane), HFC-245fa (1,1,1,3,3-pentafluoropropane), HFC-365mfc (1,1,1,3,3-pentafluorobutane), propane, n-butane, isobutane, 2-methylbutane, n-pentane, cyclopentane, dimethylether, bis(trifluoromethyl)sulfide, carbon dioxide, ammonia or iodotrifluoromethane. INDEPENDENT CLAIMS are also included for:    (1) producing cooling, comprising evaporating the composition in the vicinity of a body to be cooled and then condensing the composition;    (2) producing heat, comprising condensing the composition in the vicinity of a body to be heated and then evaporating the composition;    (3) replacing a high global warming potential (GWP) refrigerant including R134a (1,1,1,2-tetrafluoroethane), R22 (chlorodifluoromethane), R123 (2,2-dichloro-1,1,1-trifluoroethane), R11 (fluorotrichloromethane), R245fa (1,1,1,3,3-pentafluoropropane), R114 (1,2-dichloro-1,1,2,2-tetrafluoroethane), R236fa (1,1,1,3,3,3-hexafluoropropane), R124 (2-chloro-1,1,1,2-tetrafluoroethane), R12 (dichlorodifluoromethane), R410A (blend of 50 wt.% pentafluoroethane (R125) and 50 wt.% difluoromethane (R32)), R407c (blend of 52 wt.% R134a, 25 wt.% R125 and 23 wt.% R32), R417A (blend of 46.6 wt.% R125, 50 wt.% R134a and 3.4 wt.% n-butane), R422A (blend of 85.1 wt.% R125, 11.5 wt.% R134a and 3.4 wt.% isobutane), R507A (blend of 50 wt.% R125 and 50 wt.% R143a (1,1,1-trifluoroethane), R502 (blend of 51.2 wt.% CFC-115 (chloropentafluoroethane) and 48.8 wt.% R-22) or R404A (blend of 44 wt.% R125, 52 wt.% R143a and 4 wt.% R134a) in a refrigeration, air-conditioning or heat pump apparatus, comprising providing the composition to the refrigeration, air-conditioning, or heat pump apparatus that uses, used or is designed to use the high GWP refrigerant;    (4) using the composition as a heat transfer fluid composition, comprising transporting the composition from a heat source to a heat sink;    (5) forming a foam, comprising adding the composition to a foamable composition and reacting the foamable composition under conditions effective to form a foam; and    (6) producing aerosol products, comprising adding the composition to active ingredients in an aerosol container, where the composition functions as a propellant.