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(NEWSER) – After last year's debacle left a lot of people without presents on Christmas Day, UPS and FedEx say they've spent a lot of time and money making sure there is no repeat this year.

For UPS, today will be the busiest day in its history, with 34 million packages to deliver, and it has prepared for it by spending around $500 million on projects, including automated sorting systems that make it a lot easier to train temporary workers, the Wall Street Journal reports. The company hopes the changes will not only help packages arrive on time, but improve profit margins squeezed by the huge increase in online shopping, which means most of its deliveries are now single packages instead of large business orders.

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