Normal atmospheric pressure varies, but is usually around 14.7 lbs per square inch (psi).

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Equipped with state-of-the art components, including a16:9 1920x1080 full HD 10-point touch screen, 8GB of DDR3 memory and 128GB of SSD storage, the Slider S20 weighs 2.2 lbs. and is less than 1 inch thick for lightweight on-the-go computing.

ENGADGET: MSI's Slider S20 Windows 8 convertible gets first quarter release, priced at $1,200

Slim and light, VAIO Duo 11 weighs approximately 2.84 lbs. and features an 11.6-inch screen.

ENGADGET: Sony's VAIO Duo 11 Windows 8 slider goes on sale this month, starts at $1,100