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 BLS reports that travel agents in Maryland earned the highest average annual income as of May 2011, at $43,270. Massachusetts was next at $41,320, followed by New Hampshire at $40,160. California employed the greatest number of travel agents, with 8,870 agents earning an average of $38,880 a year.Florida was next with the 6,860 agents who averaged $31,740 per year.alifornia employed the greatest number of travel agents, with 8,870 agents earning an average of $38,880 a year. Florida was next with the 6,860 agents who averaged $31,740 per year.