Calibration of four-color and Hβ photometry, in terms of intrinsic color and absolute magnitude, for the B-, A- and F-type stars is about finished, though still subject to small changes. The data for the bright stars in the northern and southern hemispheres and for a number of the brighter open clusters were used in obtaining these calibrations. Some of the data have been published; much more of it will be going to press shortly. The calibration is interesting not only for itself and its applications, but because deviations from it may be due in part to rotational velocity effects.