These are but laptops. However, netbooks are a lot different from notebooks in terms of features, cost, and weight; but not much on size.
Netbooks, from the word "net", primarily imply that these tiny laptops help you connect and complete work on the Internet.
No wonder, netbooks are getting more popularity in recent years since they were first introduced in 2008, because they do help you a lot better in completing your reports in no time. Generally, netbooks are smaller, less powerful and less expensive than notebook computers.
They have screens smaller than 12 inches and weigh only around two pounds. Typically they cost between $300 and $600. One best example of a netbook is the Asus EEE PC 4G.
Notebooks on the other hand, are like laptops. They're full featured, smaller in size, even lighter than a typical laptop, but they can be as powerful. They usually have screens ranging from 12 to 17 inches and weigh around 5 to 6 pounds.
The Lenovo ThinkPad X300 is a qualified example of a notebook computer. It has a 13.3-inch screen and weighs only 3.2 pounds. It's powerfully-featured to function much like a larger laptop.
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