The Stark broadening parameters of P IV
lines are of interest not only for the plasma
diagnostic but for the research of
regularities and systematic trends and theoretical considerations as
well. Consequently, Stark widths for P IV 
,
and 
multiplets have been
determined (Dimitrijevic & Konjevic 1981;
Dimitrijevic
1988a,b) within the modified semiempirical approach (Dimitrijevic &
Konjevic 1980),
Griem's semiempirical approach (Griem 1968), simplified semiclassical approach
(Eq. (526) in Griem 1974) and its modification
(Dimitrijevic &
Konjevic 1980).
This paper is the fifteenth of a series devoted to the calculation of Stark broadening parameters of spectral lines of multicharged ions (see Dimitrijevic & Sahal-Bréchot 1995 and references therein, as well as Dimitrijevic & Sahal-Bréchot 1996a,b). In order to continue our research of Stark broadening parameters needed for the investigation of astrophysical and laboratory plasmas and to provide the needed Stark broadening data, we have calculated within the semiclassical-perturbation formalism (Sahal-Bréchot 1969a,b) electron-, proton-, and He III-impact line widths and shifts for 114 PIV multiplets. The original computer code (Sahal-Bréchot 1969a,b), has been updated and optimized several times (Sahal-Bréchot 1974; Fleurier et al. 1977; Dimitrijevic et al. 1991; Dimitrijevic & Sahal-Bréchot 1996c). A summary of the formalism is given in Dimitrijevic & Sahal-Bréchot (1996c).