The ultra portable Thinkpad X61 laptop from the Lenova (formerly IBM) stable has 2 models to choose from: the X61 and the X61s. The latter has a slightly slower processor with corresponding longer battery life. Both are very compact and light weight.

The X61 has a rugged construction typical of Thinkpads with a strong body, solid keyboard, and sturdy hinges. The outer dimensions of the laptop are 10.6″ x 8.3″ x 1.4″ and a weight of just 3.1 lbs which puts it in the ultra compact range. The display is 12″ XGA TFT matrix with a resolution of 1048 x 768 pixels. It has a somewhat limited viewing angle close to the screen.