exjobb/rapport/setup/mynotation.sty

% Define some abbreviations
\RequirePackage{xspace}
\let\textabbr\textsc
\newcommand{\abbrPID}{\texorpdfstring{\textabbr{pid}}{PID}\xspace}
\newcommand{\abbrARMA}{\texorpdfstring{\textabbr{arma}}{ARMA}\xspace}

% Common sets
\newcommand{\reals}{\mathbb{R}}
\newcommand{\complexes}{\mathbb{C}}
\newcommand{\rationals}{\mathbb{Q}}
\newcommand{\naturals}{\mathbb{N}}
\newcommand{\integers}{\mathbb{Z}}

% Text style for different kinds of words.
\newcommand{\textfilename}[1]{\mbox{\emph{#1}}}% The command \filename is already used by some other package.
\newcommand{\styname}[1]{\texorpdfstring{{\fontsize{0.9em}{1\baselineskip}\selectfont\mbox{\textsf{#1}}}}{#1}}
\newcommand{\classoption}[1]{\mbox{\texttt{#1}}}
\newcommand{\texcommand}[1]{\mbox{\texttt{\textbackslash #1}}}
\newcommand{\envname}[1]{\mbox{\texttt{#1}}}

% Miscellaneous strings with special formatting
\newcommand{\rtthesis}{\emph{\styname{rtthesis}}\xspace}% It's not really a style file (package), but it is close enough.

% It's hard to get good-looking underscores in filenames.  This is one attempt...
\newcommand{\usc}{\hspace{0.1ex}\rule{1ex}{0.1ex}\hspace{0.1ex}}%\raisebox{2.5pt}{\_}