Amazon celebrated its 20th birthday on July 15 with a sale larger than Black Friday called Prime Day. Available only to Prime users, the sale proved to be a big success for the company.

Worldwide order growth increased by 266% over the same day last year and 18% more than last year's Black Friday.

In the US, Amazon shipped 47,000 TV sets, 41,000 Bose headphones and 14,000 iRobot Roomba 595 Pet Vacuum cleaners. Amazon's own Fire TV Stick flew of the shelves at the rate of 'tens of thousands" in just one hour. Fire tablets were popular too and more were sold than on Black Friday last year, but the exact number isn't disclosed.

Despite proving to be a success, the first ever Amazon Prime Day was met with discontent by some customers. Their expectation was that the mega sale would include more tech related deals.

For Amazon however, Prime Day did exactly what it was meant to - push users to try out the Prime service. On July 15 more new members tried Prime worldwide than any single day in the company's history.

I am sure Amazon will try this again next year.

Going into this, we weren't sure whether Prime Day would be a one-time thing or if it would become an annual event. After yesterday's results, we'll definitely be doing this again.

Finally, here's an interesting list of the top selling items in different countries:

US : Lord of the Rings: The Motion Picture Trilogy

: Lord of the Rings: The Motion Picture Trilogy UK : Lenovo FLEX 10 10.1-inch Multimode Touchscreen Notebook

: Lenovo FLEX 10 10.1-inch Multimode Touchscreen Notebook Spain : SSD Drive

: SSD Drive Japan : Green Smoothie mix

: Green Smoothie mix Italy : Logitech Keyboard

: Logitech Keyboard Germany : Croc Sandals

: Croc Sandals France : Monopoly Boardgame

: Monopoly Boardgame Canada : Huggies Diapers

: Huggies Diapers Austria: Croc Sandals

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