Maemo

Maemo is a development platform that is open source for devices that use a Linux system, like the internet tablets, which inherited the architecture of Linux from the Unix operating system.

Internet tablet is a device used to provide the level of desktop PCs that are used for Internet services (such as web pages and email.) Those devices has a high resolution, touch-sensitive screen with 800 x 480 pixel size. Nokia has released three Internet Tablet platform Maemo, the Nokia 770, Nokia N800, and Nokia N810, and the latest Nokia N900.

Hardware
Maemo operating system designed for the Nokia internet tablets, which have features similar specifications with high-level mobile phones Nokia, the N series and E series, with a TI OMAP ARM SOCS, large screen and internal storage that can be enlarged.

Source : www.wikipedia