There are many applications developed annually by Autodesk and third-party developers to enhance the functionality of AutoCAD and AutoCAD-based products. Autodesk recommends the creation and use of a unique prefix for naming application directories, exported program symbols, and entries in database symbol tables and common dictionaries. This prefix will help to prevent namespace conflicts between applications, variable names, and even files that might arise while installing or running an application. The prefix can be a mnemonic, product name, company name, or other appropriate abbreviation.
For portability, you should restrict the characters in a unique prefix to those permitted in operating system file names. You should avoid using characters with special marks, such as umlauts or accents.