A subnotebook is a small and lightweight portable computer, with most of the features of a standard laptop computer but smaller. The term is often applied to systems that run full versions of desktop operating systems such as Windows or Linux, rather than specialized software such as Windows CE, Palm OS or Internet Tablet OS. Synonyms include "ultraportable" and "minilaptop", while Psion has coined "netbook". The term "ultra-mobile PC" ("UMPC") is also used, although this is the name of a platform of small form-factor tablet PCs (see UMPC). Subnotebooks are smaller than laptops but larger than handheld computers. They often have smaller-sized screens, usually measuring from 7 inches (17.7 cm) to 13.3 inches (33.78 cm), and a weight from less than 1 kg (2.2 lbs) up to about 2 kg (4.4 lbs). The savings in size and weight are usually achieved partly by omitting ports or having removable media/optical drives; subnotebooks are often paired with docking stations to compensate. Subnotebooks were seen as niche computing products and have rarely sold in large numbers until the 2007 introduction of the Asus Eee PC and the OLPC XO-1, known as ultra low-cost PC (ULPC or ULCPC), which are inexpensive in comparison to both existing machines in that form factor, and computers in general. (via Wikipedia)

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