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Using the multiconfiguration Dirac-Hartree-Fock and the relativisticconfiguration interaction methods, a consistent set of transition energies andradiative transition data for the main states of the $2s^2 2p^4$, $2s 2p^5$,$2p^6$, $2s^2 2p^3 3s$, $2s^2 2p^3 3p$, $2s^2 2p^3 3d$, $2s 2p^4 3s$, $2s 2p^43p$, and $2s 2p^4 3d$ configurations in O-like Ions between Ar XI ($Z = 18$)and Cr XVII ($Z = 24$) is provided. Our data set is compared with the NISTcompiled values and previous calculations. The data are accurate enough foridentification and deblending of new emission lines from hot astrophysical andlaboratory plasmas. The amount of data of high accuracy is significantlyincreased for the $n = 3$ states of several O-like ions, where experimentaldata are very scarce.

Extended Calculations with Spectroscopic Accuracy: Energy Levels and Radiative Rates for O-like Ions between Ar XI and Cr XVII