INTEGRAL was launched from Baikonour on October 17, 2002. Since then it observes the sky in the band from few keV to few MeV with a suite of four instruments all pointing in the same direction and producing a very comprehensive set of data on both compact and extended sources. The imaging capability of INTEGRAL is provided by coded masks, which results in an excellent match between the angular resolution and the sensitivity of the instruments.
Results are now available on a number of compact sources in our Galaxy and outside as well as on diffuse emission due to nuclear processes in the interstellar medium and to the annihilation of electron and positrons in the inner regions of the Galaxy.
