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The Galactic O-Star Spectroscopic Survey (GOSSS) is obtaining high qualityR~2500 blue-violet spectroscopy of all Galactic stars ever classified as of Otype with B < 12 and a significant fraction of those with B = 12-14. As of June2013, we have obtained, processed, and classified 2653 spectra of 1593 stars,including all of the sample with B < 8 and most of the sample with B = 8-10,making GOSSS already the largest collection of high quality O-star opticalspectra ever assembled by a factor of 3. We discuss the fraction of falsepositives (stars classified as O in previous works that do not belong to thatclass) and the implications of the observed magnitude distribution for thespatial distribution of massive stars and dust within a few kpc of the Sun. Wealso present new spectrograms for some of the interesting objects in the sampleand show applications of GOSSS data to the study of the intervening ISM.Finally, we present the new version of the Galactic O-Star Catalog (GOSC),which incorporates the data in GOSSS-DR1, and we discuss our plans for MGB, aninteractive spectral classification tool for OB stars.

The Galactic O-Star Spectroscopic Catalog (GOSC) and Survey (GOSSS): first whole-sky results and further updates