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The Intel Classmate (centre) is the bulkiest of the three notebooks, measuring 24.5cm wide by 19.6cm deep by 4.4cm high. The OLPC XO has the biggest footprint (24.2cm x 22.8cm), while the ASUS Eee is the baby of the bunch at 22.5cm by 16.5cm by 3.5cm. The Eee is also the lightest of the trio by some distance, weighing 920g, compared to 1.45kg for both the XO and the Classmate. In terms of overall stylishness the Eee is the winner, but the XO and the Classmate are both more rounded and rugged, and come with carrying handles.
The OLPC XO has the biggest screen, an innovative 7.5in. dual-mode transmissive/reflective LCD that can swivel from traditional clamshell mode to 'e-book' mode with the screen facing outwards, tablet-style (although it's not a touch-screen). The Classmate and Eee both have similar, rather cramped, 7in. TFT displays.
There are three different operating systems on view here: the XO runs a Red Hat Fedora 6-based version of Linux and the Sugar graphical user interface (GUI); the Classmate runs Windows XP (although some Linux distributions are also supported); and the Eee runs a Xandros-based Linux distribution (with Windows XP also now available).
The XO's keyboard is a waterproof membrane-style unit, while the Classmate and Eee have more traditional, if small, keyboards.