A B.A. in linguistics is good training for careers in:
Computer Science and Software Development
Because language is a natural behavior, constrained by physiological and social structures, and is a medium for creative expression, linguistics constitutes a significant component of many fields in the humanities, social, and hard sciences. It therefore provides good preparation for further study or training in:
The study of linguistics raises awareness of how effective communication works. A B.A. in linguistics can therefore be beneficial to anyone who needs to communicate effectively, including those in:
Boston University's site is a nice place to start when looking for information on what you can do with a B.A. in linguistics.