"Netbook makers have turned to Linux, an open-source operating system that costs $3 instead of the $25 that Microsoft typically charges for Windows XP. They are also exploring the possibility of using the Android operating system from Google, originally designed for cellphones. (Companies like Acer, Dell and Hewlett-Packard already sell some Atom-based netbooks with Linux.)
The author presents Android as a distinct OS made by Google,
omitting it is Linux too.