Projected and intrinsic rotational velocity distributions of B and Be stars in NGC 330. The normalized histogram in each panel shows the observed projected rotational velocities in NGC 330, while the solid line indicates the intrinsic distribution of rotational velocities, that is corrected for random inclination angles. The dotted and dashed lines show the intrinsic rotational velocity distributions for stars in 30 Dor and NGC 346, respectively (Dufton et al. 2013, 2019, 2022). The number of stars in each sample is indicated in brackets. The top panel shows B and Be stars combined, the middle panel focuses on B-type stars, while the bottom panel shows the Be stars only.