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An airline ticket is a document or electronic record that confirms a seat on a flight. Learn about the information, processes and history of airline tickets, including the issuing airline code and the fare basis.
Learn how the British government introduced rationing during and after wars to cope with food shortages and scarcity. Find out what items were rationed, how ration books worked, and how rationing affected people's lives and health.
Learn about the origin and evolution of coupons, from the first-ever coupon for a free glass of Coca-Cola in 1888 to the modern electronic and mobile coupons. Find out how coupons are used for marketing, pricing, and taxation purposes.
A frequent-flyer programme (FFP) is a loyalty program offered by an airline to encourage customers to accumulate points for rewards. Points can be earned by flying, using co-branded credit cards, or spending money at associated businesses.
Learn about the mathematical analysis of "collect all coupons and win" contests, also known as the cereal box problem. Find the expected number of trials, the limit distribution, and the generalizations of the problem.
Valpak is a North American company that provides print, mobile and online advertising, customer data and coupons. It mails coupons to 41 million households each month and offers postcards, data and analytics services to advertisers.
Learn how 30/360 methods calculate interest accrual for bonds and loans based on a 30-day month and a 360-day year. Compare different variations of 30/360 methods and their adjustment rules for US and European markets.
Learn about the Beatles' song "A Day in the Life", written by Lennon and McCartney for their 1967 album Sgt. Pepper's Lonely Hearts Club Band. The lyrics were inspired by newspaper articles, LSD experiences and a friend's death, and the song features orchestral glissandos and a famous chord.