1 converts written data into sound waves. 2  converts the sound waves from a voice into a digital signal. 3  converts letters from the keyboard into digital format. 4  converts digital sound waves into analog sound waves.
Travel agencies make their money in a variety of ways. The products agents sell have built-in fees that result in a profit for the agency. The amount of the fees and the ways in which they are earned and distributed differ by the type of product sold and the suppliers who provide that product to the agency.
Most real estate agents earn their money by helping clients buy or sell homes or other real property, such as land or commercial buildings. The life of a real estate agent frequently includes many miles spent driving to and from properties and for business-related reasons. Real estate agents, especially full-time professional agents, frequently manage to accumulate impressive annual mileage averages.