Acer Aspire One is a fabulous netbook. A netbook, also called a sub-notebook, is a laptop with small dimensions. Its screen size is just 8.9 in and it is easy to carry around without any fuss. Acer Aspire One comes pre-loaded with the Linpus Linux OS which has been derived from Fedora 7. Linpus has been specially designed to be run on sub-notebooks such as Acer Aspire One.