\inputencoding{utf8}
\HeaderA{ver20}{Johnson \& Johnson,  \$ \_  \#\#\# \textasciicircum{} \textasciitilde{}}{ver20}
%
\begin{Description}
This is the description
\end{Description}
%
\begin{Arguments}
\begin{ldescription}
\item[\code{foo}] item 1
\item[\code{bar}] space, the item 2
\item[\code{bah}] newline, then item 3
\end{ldescription}
\end{Arguments}
%
\begin{Details}
\R{} \R{} \bsl{}R \eqn{\alpha\beta\Gamma}{}

In code, all that needs to be escaped is percent, backslash and unpaired
braces: \code{\% \bsl{} \{}. Unescaped: \code{\$ \# \_ \textasciicircum{} \textasciitilde{} < > |}, and as a
pair, \code{\{...\}}.  If we escape: \code{ \bsl{}\_ \bsl{}\# \bsl{}\$ \bsl{}\& \{ \} \bsl{} }
And some backslashes: \code{\bsl{} \bsl{} \bsl{}\bsl{} \bsl{}\bsl{}} should
give one, one, two, two backslashes.

How about \bsl{} (that is backslash space) in text?

Elsewhere, \{ \} \% \bsl{} need to be escaped, but not \$ \# \_ \textasciicircum{} \textasciitilde{} < > | .
Let's try that again in \code{\bsl{}samp}: \samp{ \{ \} \% \bsl{} \$ \# \_ \textasciicircum{} \textasciitilde{} < > |}.
And if we do escape: \bsl{}\$ \bsl{}\# \bsl{}\_ , and with three backslashes, \bsl{}\bsl{}\#.

\deqn{a < b > c | d, x^y}{}
\deqn{\$k > \#k, x_y, x\_y}{}

group-weighting from \$[N\_iP\_i(1-P\_i)]\$

\begin{alltt}
    % a
    \bsl{}
    \bsl{}% c
    \{
    \bsl{}\{
  \end{alltt}

\end{Details}
%
\begin{Section}{URLs and emails}
URLs need to be verbatim:  \url{testit ~^_$\#<>|}.

Markus Kuhn, ``ASCII and Unicode quotation marks''.
\url{http://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html}

No escape is needed in \email{Micah\_Altman@harvard.edu}
\end{Section}
%
\begin{Examples}
\begin{ExampleCode}
"\\r\\n"
\end{ExampleCode}
\end{Examples}