It consultants help their clients with informations systems, network architecture, hardware, software and a number of other technology-related issues. Even a consulting firm of one is a business. Many consultants operate out of their homes and make the mistake of assuming they can run their businesses license-free. However, most cities and states require business tax registration and licensing for all businesses, of all sizes – and some require Home Occupation Permits for home-based businesses.
Tucson has fewer licenses and permits than Phoenix, but still a fair amount of licensing required for new businesses. Fortunately, Arizona has a well-organized set of applications and processes. Business owners must also collect licenses from a combination of Tucson and Pima County, some of which require visiting government offices in-person. Tucson's economy includes industrial giants such as Raytheon Missile Systems, Texas Instruments, IBM, Intuit Inc., Universal Avionics, Sunquest Information Systems, Sanofi-Aventis, Ventana Medical Systems, Inc., and Bombardier Aerospace. Further, Tucson has become a hotbed for optics businesses and technology, housing more than 150 companies in the optics field.