Helvetica.sty?

[Anna H.Pryor]

For a conference that I am putting my paper in, I have the following:

We discourage the use of LaTeX but if you must use this format please observe 
the following instructions: In order to generate screen-readable PDF you need to 
in the preamble:
.
.
\usepackage{helvetica}%set \sf font to Helvetica


The other packages work fine...this one, I get an error on.  It says that there 
is no Helvetica.sty.  Can someone tell me where I can get it?


Thanks,

Anna