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.
Contrary to popular belief, a travel agent won't always cost more. In fact, it's possible you will pay less than booking a vacation yourself because agents might be aware of promotional offers and occasionally have access to exclusive deals.ome agents will charge a per-hour fee for their time in planning a trip. Agents can earn commissions on some bookings, but it's not nearly as lucrative as it used to be because airlines don't pay commission. In general, however, using a travel agent will often cost about the same as booking it yourself, experts say.