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.
Many cruise agents work on a commission basis, meaning their income can vary based on performance. For instance, agents working for Cruise Adventure Travel, a Winter Park, Fla. travel agency specializing in cruise vacations, might earn anywhere from $25,000 to $50,000 during their first year.