How do I find a mathmatical symbol not in standard Microsoft?

[penny]

I am trying to find a mathmatical symbol that is not listed in the standard
insert symbol box. How do I find it?

 

[Peter Foldes]

Try here

http://www.staff.vu.edu.au/mcaonline/tool/symbols/symbol.html
http://members.aol.com/jeff570/mathsym.html
http://www.fiu.edu/~morriss/bookword/symbols/symbolismsites.html