And you can do the google trick with programming languages: Microsoft's C#, which supports its platform. Another example is postscript - a highly specific language tied to a system.
You can also make money by implementing a language that someone else created: java vendors e.g. BEA Systems; C++ vendors e.g. Borland; and SQL vendors.
You can also make money by implementing a language that someone else created: java vendors e.g. BEA Systems; C++ vendors e.g. Borland; and SQL vendors.