2010/7/7 Jes=FAs Gabriel y Gal=E1n <jgabrielygalan / gmail.com>

> On Wed, Jul 7, 2010 at 5:51 PM, Abder-rahman Ali
> <abder.rahman.ali / gmail.com> wrote:
>
> > When should we use one over another?
>
> I don't think this question has any sense, as they are completely
> different concepts.
>

A better question would be: Why use a symbol? Although, a quick Google
search will give some good answers.