Using multireference CI methods for F2CO in C-2v symmeltry, with near triple-zeta basis sets and added polarization and diffuse functions, CO, CF, and FCF potentials were calculated for four states each of (1)A(1),B-1(1),B-1(2), and (1)A(2) symmetry. Vertical excitation energies were obtained for six roots, both for singlet and triplet states. Also, vertical and some adiabatic ionization potentials of SCO were calculated. System I of the UV absorption spectrum is clearly n(o) --> pi*. System II, ranging from 7.02 to 7.66 eV, can only be assigned to triplet pi --> System III is most likely n(o) --> 3s/n(o) --> sigma*. System IV, a continuum, is assigned to pi --> pi*, on the basis of its large oscillator strength. Following calculated ionization potentials (IP), the 17.2 eV photoelectron band is assigned to 8a(1) and the 16.6 eV one to 4b(2). This way, up to the eighth IF, calculated and experimental values agree within 0.2 eV. The perfluoro effect has been reinvestigated. Calculated vibrational frequencies of the three lowest states of F2CO+ are used for an understanding of the vibrational structure of the photoelectron spectrum.