\input texnames.sty

\parskip = \baselineskip
\nopagenumbers

\def\test{%
  \AMSTeX\par
  \BibTeX\par
  \LAMSTeX\par
  \LaTeX\par
  \MF\par
  \SLiTeX\par
}

\rm \test
\it \test
\bf \test
\sl \test
\bye