Listofsymbols provides commands to automatically create a list of symbols (also called notation or nomenclature), and to handle symbols logically, i.e. define a macro that is expanded to the desired output and use the macro in the text rather than `hardcoding' the output into the text. This helps to ensure consistency throughout the text, especially if there is a chance that symbols will be changed at some stage.

The package is more or less a combination of what the packages nomencl and formula do. The concept of creating the list of symbols, though, is different from the way nomencl.sty does it.

The author is Stefan Spreng.