Microsoft has a list of Windows 7 minimum recommended system hardware specification requirement for desktop, notebook, netbook, nettop, laptop computer and tablet PC that intends to run any versions and editions of Windows 7. However, not all computers is required to meet these requirements though, and in fact, some PC is not even allowed to have such high hardware specifications.
For marketing purpose, Microsoft has a separate set of maximum hardware specification requirements (rather more appropriately limitation) for small notebook PC segment, which also known as netbook or nettop. The hardware specifications limit applies to the following SKUs:
Windows 7 Starter
Windows 7 Starter for Small Notebook PC
Windows 7 Home Basic For Small Notebook PCs (China only)
The maximum hardware specification limit is similar in scope to Microsoft Windows XP Home Ultra Low Cost PC (ULCPC) program. However, the maximum hardware specificaftions allowed for Windows 7 Start, Windows 7 Home Basic, Windows XP and Windows Vista Small Notebook PC program has been streamlined and simplified, with universal CPU criteria and new screen limit size of 10.2 inches when measured diagonally as the defining boundary between a small notebook PC and full-featured laptop. There is also no more graphics card and touch capability limitations.