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.
Average Annual Income. The Bureau of Labor Statistics includes cruise agents in a broader job category of travel agents, who help clients meet all kinds of travel needs that go beyond cruises. The average for this position was $35,740 per year as of May 2011.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.