\def\sll{simply linked list}
\def\Sll{Simply linked list}
\def\dll{doubly linked list}
\def\Dll{Doubly linked list}
\def\ttt{2-3 tree}


\def\class#1{\texttt{#1}}
\def\kbd#1{\texttt{#1}}

Add definitions of TeX macros for semantic markup.
Add definitions of TeX macros for semantic markup.
