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Cloud computing
Cloud computing is Internet-based computing, whereby shared resources, software, and information are provided to computers and other devices on demand, like the electricity grid.
Cloud computing is a paradigm shift following the shift from mainframe to client–server in the early 1980s. Details are abstracted from the users, who no longer have need for expertise in, or control over, the technology infrastructure "in the cloud" that supports them. Cloud computing describes a new supplement, consumption, and delivery model for IT services based on the Internet, and it typically involves over-the-Internet provision of dynamically scalable and often virtualized resources.
It is a byproduct and consequence of the ease-of-access to remote computing sites provided by the Internet. This frequently takes the form of web-based tools or applications that users can access and use through a web browser as if it were a program installed locally on their own computer..
Cloud computing:
The term "cloud" is used as a metaphor for the Internet, based on the cloud drawing used in the past to represent the telephone network and later to depict the Internet in computer network diagrams as an abstraction of the underlying infrastructure it represents.
Typical cloud computing providers deliver common business applications online that are accessed from another Web service or software like a Web browser, while the software and data are stored on servers. A key element of cloud computing is customization and the creation of a user-defined experience.
Most cloud computing infrastructures consist of services delivered through common centers and built on servers. Clouds often appear as single points of access for all consumers' computing needs. Commercial offerings are generally expected to meet quality of service (QoS) requirements of customers. The major cloud service providers include Microsoft, Salesforce, Skytap, HP, IBM, Amazon and Google.
NetBooks
Netbooks (sometimes also called mini notebooks or ultraportables) are a branch of subnotebooks, a rapidly evolving category of small, lightweight, and inexpensive laptop computers suited for general computing and accessing Web-based applications; they are often marketed as "companion devices", i.e., to augment a user's other computer access.
At their inception in late 2007 — as smaller notebooks optimized for low weight and low cost — netbooks omitted certain features (e.g., the optical), featured smaller screens and keyboards, and offered reduced specification and computing power. Over the course of their evolution, netbooks have ranged in size from below 5" screen diagonal to over 11.6".
A typical weight is 1 kg (2-3 pounds). Often significantly less expensive than other laptops, by mid-2009, some wireless data carriers began to offer netbooks to users "free of charge", with an extended service contract purchase.
In the short period since their appearance, netbooks have grown in size and features, now converging with new smaller, lighter notebooks. By August 2009, when comparing a Dell netbook to a Dell notebook, CNET called netbooks "nothing more than smaller, cheaper notebooks," noting, "the specs are so similar that the average shopper would likely be confused as to why one is better than the other," and "the only conclusion is that there really is no distinction between the devices. However, in the same month, Walt Mossberg called them a "relatively new category of small, light, minimalist, and cheap laptops.
Features of net book
Netbooks typically have less powerful hardware than larger laptop computers. Some netbooks do not even have a conventional hard drive. Such netbooks use solid-state storage devices instead, as these require less power, are faster, lighter, and generally more shock-resistant, but with much less storage capacity (such as 8, 16, or 32GB compared to the 80 to 500GB mechanical hard drives typical of many notebooks/laptop computers).
All netbooks on the market today support Wi-Fi wireless networking and many can be used on mobile telephone networks with data capability (for example, 3G). Mobile data plans are supplied under contract in the same way as mobile telephones. Some also include Ethernet and/or modem ports, for broadband or dial-up Internet access, respectively.
Processor architecture
x86:
Most netbooks, such as those from Asus, Dell, Toshiba, Acer use the Intel Atom notebook processor (typically the N270 1.6 GHz but also available is the N280 at 1.66 GHz, replaced by the N450 series with graphics and memory controller integrated on the chip in early 2010 and running at 1.66 GHz), but the x86-compatible VIA Technologies C7 processor is also powering netbooks from many different manufacturers like HP and Samsung. VIA has also designed the Nano a new x86-64-compatible architecture targeting lower priced, mobile applications like netbooks. Currently, one netbook uses the Nano the Samsung NC20. Some very low cost netbooks use a System-on-a-chip Vortex86 processor meant for embedded systems, just to be "Windows compatible", but with very low performance.
Free OS for netbooks
Computers are getting more and more powerful, with capabilities expanding to allow funky 3D graphics, realistic gaming and even HD video editing. On the other hand, netbooks are small, lightweight, and usually cheap—perfect for getting simple tasks done quickly.
Netbooks are so successful because people need to break free of wires and take care of ordinary, everyday work which includes editing simple documents, sending and receiving email, surfing the Web, and chatting with friends. None of these things need the latest or greatest hardware, and so specialized components like Intel’s Atom processors were developed. However, most netbooks still use operating systems and software designed for desktops nearly a decade ago.
If your netbook is a secondary machine which you use while traveling or lounging around, you most probably don’t want it to look and feel like a desktop or laptop. You just want to flip it open, scan through a website or check a message, and put it aside. In such cases it makes very little sense to wait four or five minutes while Windows boots up, wait for a browser to load, then sign into your various accounts. You’d rather have something designed to power up instantly, and show you your information front and center within seconds
An OS designed specifically for netbooks will have text and icons optimized for smaller screens, and will run smoothly on limited hardware resources. It’s also safe to assume that most netbooks will be used in places where they have access to a broadband wireless Internet connection, so OSes can pull down information and interact with online services without the traditional constraints that desktop OSes have been created around.jolicloud is one of such free Os ,based on linux.

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