you must have heard about netbooks and notebook terminologies prevailing in market, but do you know the actual difference between these two words??
so here i go.......

Notebook computers are lighter than the laptops we looked at in the previous section. They usually have screens ranging from 12 to 17 inches (30.5 to 43.2 centimeters) and weigh around 5 to 6 pounds (2.3 to 2.7 kilograms). Ideally, a notebook computer has the same processing power and features as larger laptop computers. Many manufacturers charge a premium price for the convenience of a small computer that packs a big punch.
Netbook computers are relative newcomers to the computer market. The general definition for a netbook computer is that they are smaller, less powerful and less expensive than notebook computers.
When they first began to get attention in early 2008, netbooks seemed to contradict the popular philosophy in the computer market. For many years, the prevailing strategy for computer consumers was to find the fastest, most powerful computer in their price range. But consumers are beginning to understand that they don't necessarily need a bleeding-edge computer for most of the tasks they perform. And as the Web takes a more prevalent role in computing, the processing requirements for consumer computers become less demanding.
Though people disagree on specific metrics for netbooks, in general they have screens smaller than 12 inches (30.5 centimeters) and weigh only one or two pounds (.5 to .9 kilograms). 
NETS AND CLOUDS:
Netbooks and cloud computing go hand-in-hand. A cloud computing network is a collection of servers that provides data storage and processing power over the Internet. Ideally, a cloud computing service eliminates the need for an expensive, powerful personal computer. The machines on the Internet do all the hard work for you.

so.., basically a netbook is one which is designed for use over internet and making full use of cloud computing services rather than using an expensive hardware configuration notebook!