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+% aplstyle.tex
+%
+%===============================================================
+% A P L S T Y L E
+%===============================================================
+% A.Hohti/O.Kanerva University of Helsinki April 6 1987
+%
+% APL symbols are represented by the Digital (VAX) APL replacement
+% symbols. The standard escape sequence is changed to "@" (at sign)
+% in accordance with the usage in Digital APL.
+%
+\font\apl=cmapl10 % The APL font of typewriter type
+%
+%
+% The following macro switches the typewriter-like font
+% used within verbatim
+\def\ifundefined#1{\expandafter\ifx\csname#1\endcsname\relax}
+\outer\def\choosett#1{\ifundefined{#1}
+ \message{Undefined font(?), replaced with cmtt10}
+ \let\tt=\tentt
+ \else
+ \def\tt{\expandafter\csname#1\endcsname}\fi}
+%
+\choosett{tentt} % default value
+%
+\input aplverb % definitions for verbatim
+\input apldef % control sequences for the APL symbols
+
+\endinput