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.
The travel agent is paid a portion of the commission and the agency keeps the rest of the commissions for operational costs, advertising, promotions... A traditional travel agency pays anywhere from 10-20% of the commissions to the agent. Most traditional travel agencies can't compete with the internet and are closing. That's why I decided to own an on-line travel agency through a great company. I get great training, mentoring and support from the parent company.