🚀 go-pugleaf

I have obtained a number of font style files from various ftp sites, 
including psfonts.sty. These include ncs, bookman, avantgarde, times, 
chancery, and palatino. 

For example, the LaTeX style for Palatino text is:

   % latex style using Palatino for text.
   \def\@mrm{pplr}% palatino
   \def\@mit{pplri}% palatino - italic
   \def\@msl{pplro}% palatino - oblique
   \def\@mbf{pplb}% palatino - bold
   \def\@mcsc{pplrc}% palatino - small caps
   \def\@mtt{pcrr}% courier
   \def\@mss{phvr}% helvetica
   \input psfonts.sty

I am unable to work out how exactly to access a font such as this, and its
variations.

Can someone please tell me EXACTLY what commands to type in so that I can
use these fonts.

Are these font styles only available for postscript output (using dvips)?

Or can I produce output on the screen, or my HP DeskJet printer?



Any advice is greatly appreciated.

Mike.