Amazon's Kindle Fire HD topped the Internet retailer's list of best selling items this Christmas, according to a company press release.

The product was rated top in its three categories of best-selling, most gifted and most wished for products across all the millions of items available on Amazon worldwide since its introduction 15 weeks ago. Its Kindle Fire, Kindle Fire Paperwhite and Kindle held the next three spots in the list.

"Cyber Monday 2012 was the biggest day ever for Kindle sales worldwide," Amazon revealed.

The Kindle Fire HD comes as a 7-inch or 8.9-inch tablet and has proven a worldwide hit for the company, although it hasn't disclosed actual sales figures.

One of the reasons behind its success has been its price. Amazon sells the tablet at $199 for the 7-inch version or $299 for the 8.9-inch version. With a 1.5GHZ dual-core processor, 1920x1200 pixel full HD display, the Kindle Fire HD has many advantages over Apple's iPad Mini, which comes with an Apple A5 processor and boasts only a 1024x768 pixel display. Apple sells its 7.9-inch tablet at $329 for the 16GB model, going up to $529 for the 64GB.

Amazon's secret is that it can shift its flagship tablet at low margins by relying on its vast library of digital products to lock customers into the Amazon ecosystem.

The company boasts that its Kindle customers have access to a digital media selection of 23 million movies, TV shows, songs, magazines, books, audiobooks, and popular apps and games - an increase from 19 million in 2011.

"Sales of apps and games during the holiday period alone were up more than 250 percent over the same period last year," said the company.

The company also revealed that it was the top holiday retailer in customer satisfaction for the eight year running, based on research firm ForeSee's Holiday E-Retail Satisfaction Index.