Lenovo ThinkPad X220
The Lenovo ThinkPad X220 is a laptop computer from the ThinkPad series that was manufactured by Lenovo. It uses a 12.5 inch IPS or TN display. A tablet version was also released. Modifications 
The keyboard from the X220 has been retrofitted in a X230. References

External links 

 Arch Linux wiki - X220
 Thinkwiki.de - X220

Lenovo