What characters are allowed in mathematica variable names? i.e. how

*To*: mathgroup at smc.vnet.net*Subject*: [mg126001] What characters are allowed in mathematica variable names? i.e. how*From*: Jesse Perla <jesseperla at gmail.com>*Date*: Thu, 12 Apr 2012 02:35:24 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

In other languages like C++, _ is a kosher character to be in variable names. It is not in mathematica, so things like "my_first_variable" don't work. I have been using a ` to separate out the words to get things like my`first`variable, but now realize it is creating other issues due to the scoping it introduces. Are there are other characters I can use to separate out words in variable names? Thanks

**Follow-Ups**:**Re: What characters are allowed in mathematica variable names? i.e. how***From:*"J. McKenzie Alexander" <jalex@lse.ac.uk>