\documentclass[10pt,a4paper]{article}
\font\olb=olb10 scaled 1000
\font\olbx=olbx10 scaled 1000
\font\olbxs=olbxsl10 scaled 1000
\font\oldunh=oldunh10 scaled 1000
\font\olff=olff10 scaled 1000
\font\olfib=olfib8 scaled 1200
\font\olr=olr10 scaled 1000
\font\olsl=olsl10 scaled 1000
\font\olsltt=olsltt10 scaled 1000
\font\olss=olss10 scaled 1000
\font\olssbx=olssbx10 scaled 1000
\font\olssdc=olssdc10 scaled 1000
\font\olssi=olssi10 scaled 1000
\font\olssq=olssq8 scaled 1200
\font\olssqi=olssqi8 scaled 1200
\font\oltt=oltt10 scaled 1000
\font\olvtt=olvtt10 scaled 1000
\newcommand{\Ligature}{%
\input test_alphabet.tex
}
\begin{document}

Computer Modern Roman:\\{\Ligature}

Bold Roman:\\{\olb \Ligature}

Bold Extended Roman:\\{\olbx \Ligature}

Bold Extended Slanted Roman:\\{\olbxs \Ligature}

Dunhil Roman:\\{\oldunh \Ligature}

Funny Roman:\\{\olff \Ligature}

Roman Fibonacci:\\{\olfib \Ligature}

Roman:\\{\olr \Ligature}

Slanted Roman:\\{\olsl \Ligature}

Slanted Typewriter Text:\\{\olsltt \Ligature}

Sans Serif:\\{\olss \Ligature}

Sans Serif Bold Extended:\\{\olssbx \Ligature}

Sans Serif Demibold Condensed:\\{\olssdc \Ligature}

Slanted Sans Serif:\\{\olssi \Ligature}

Sans Serif Quotation Style:\\{\olssq \Ligature}

Sans Serif Quotation Style Slanted:\\{\olssqi \Ligature}

Typewriter Text:\\{\oltt \Ligature}

Variable-Width Typewriter Text:\\{\olvtt \Ligature}
\end{document}