Offices used for the practice, following and carrying on of one or more of the following professions and businesses: Medical doctor, osteopathic doctor, dentist, chiropractor, optometrist, podiatrist, chiropodist, lawyer, engineer, certified public accountant, security broker, financial planner or consultant, bookkeeping service, secretarial service, insurance sales, real estate sales, computer programming and software service and/or data processing service (excluding product sales), or health and/or exercise center (excluding product sales).