The package provides an \ul (underline) command which will break over line ends; this technique may be used to replace \em (both in that form and as the \emph command), so as to make output look as if it comes from a typewriter. The package also offers double and wavy underlining, and striking out (line through words) and crossing out (/// over words).

The package works with both Plain TeX and LaTeX.

See also underlin-gen soul.

The author is Donald Arseneau. The package is Copyright © 1989-2011 Donald Arseneau.