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.
Before you start any career, familiarize yourself with the market and what you're getting into. The beginning travel agent makes, on average, around $15 an hour or around $30,000 a year. In the US as of 2010, there were 82,000 travel agents (a 10% rise is projected for 2020).