Amid the hoopla over Apple's iPad, US computer giant Hewlett-Packard has released a video promoting an upcoming touchscreen tablet computer of its own.

The HP Slate, which is to be available later this year, will deliver a "holistic mobile experience" allowing users to consume and create digital content on the go, HP said in a blog post on Monday.

HP posted a 30-second video on YouTube touting the features of the device, which include browsing the Web, playing games and viewing video and pictures.

The Slate resembles the iPad but unlike the Apple device it features a camera, a USB port and supports Adobe Flash.

Microsoft chief executive Steve Ballmer first displayed a prototype of HP's new tablet computer at the Consumer Electronics Show in Las Vegas in January running on Microsoft's latest Windows 7 computer operating system.

HP has not revealed pricing for the Slate.

The iPad went on sale in the United States on Saturday and is to be available in nine other countries later this month.

The cheapest iPad model, with Wi-Fi connectivity and 16 gigabytes of memory, is 499 dollars while the most expensive -- which includes 3G connectivity and 64GB of memory -- costs 829 dollars.

Apple said it sold more than 300,000 iPads on the first day of availability on Saturday.