The ARGO-YBJ experiment at YangBaJing in Tibet (4300 m a.s.l.) has been taking
data with its full layout since October 2007. Here we present the first significant results obtained
in gamma-ray astronomy and cosmic-ray physics. Emphasis is placed on the analysis of gamma-
ray emission from point-like sources (Crab Nebula, MRK 421), on the preliminary limit on the
antiproton/proton flux ratio, on the large-scale cosmic-ray anisotropy and on the proton-air cross
section. The performance of the detector is also discussed, and the perspectives of the experiment
are outlined
