Here are some more information for Celeron Dual:

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Laptop computer allows you to work without being tethered to an office. Portability and good performance make notebook PCs an essential part of the daily lives of millions of people, from college students to business travelers.
Key Features
Processor: Intel's Core Duo and Core 2 Duo processors have helped notebooks gain ground in the power department.
Some notebooks use AMD's Athlon Turion 64 X2 dual-core processor, which also supports for improved performance. The Turion 64 X2 and the Core 2 Duo both provide 64-bit support, which will become increasingly useful as more 64-bit applications reach the market.
Low-end notebooks offer Intel's Celeron M processor, which is generally not as speedy as the Core Duo processors.
System memory: Unless you're buying on the cheap, a new notebook generally includes 512MB of system memory. Many notebooks today are available with 1GB of RAM. Equipping your laptop with 1GB of RAM at the time you buy it will help extend its useful lifetime.
Screen: Notebook screens continue to get bigger and most have gone wide, enabling you to view spreadsheets or movies with ease. Even budget shoppers can afford the luxury of high-resolution color. Most notebook manufacturers offer laptops with 17-inch wide screens, too. Frequent business fliers can choose from among the many laptops with screen sizes of 12.1 or 13.3 inches, some of which are wide-screen models, as well.
Notebooks with standard-aspect 14.1  or 15-inch screens remain available, but they're not as plentiful as wide-screen models.
Battery: Notebook battery life has continued to improve. Some notebooks can run for up to 7 hours. Many vendors offer supplemental batteries to boost battery life.

Used laptop- we offer cheap used and refurbished laptops and laptop computers in excellent condition

Used laptop - We offer quantity discounts

Laptop computer allows you to work without being tethered to an office. Portability and good performance make notebook PCs an essential part of the daily lives of millions of people, from college students to business travelers.
Key Features
Processor: Intel's Core Duo and Core 2 Duo processors have helped notebooks gain ground in the power department.
Some notebooks use AMD's Athlon Turion 64 X2 dual-core processor, which also supports for improved performance. The Turion 64 X2 and the Core 2 Duo both provide 64-bit support, which will become increasingly useful as more 64-bit applications reach the market.
Low-end notebooks offer Intel's Celeron M processor, which is generally not as speedy as the Core Duo processors.
System memory: Unless you're buying on the cheap, a new notebook generally includes 512MB of system memory. Many notebooks today are available with 1GB of RAM. Equipping your laptop with 1GB of RAM at the time you buy it will help extend its useful lifetime.
Screen: Notebook screens continue to get bigger and most have gone wide, enabling you to view spreadsheets or movies with ease. Even budget shoppers can afford the luxury of high-resolution color. Most notebook manufacturers offer laptops with 17-inch wide screens, too. Frequent business fliers can choose from among the many laptops with screen sizes of 12.1 or 13.3 inches, some of which are wide-screen models, as well.
Notebooks with standard-aspect 14.1  or 15-inch screens remain available, but they're not as plentiful as wide-screen models.
Battery: Notebook battery life has continued to improve. Some notebooks can run for up to 7 hours. Many vendors offer supplemental batteries to boost battery life.

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what is better an intel pentium dual core or an intel celeron dual core?

The Celeron is Intel's budget chips. It sacrifices speed and features for low cost. The Pentium is Intel's full-feature processor line.

Go with the Pentium every time.

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Intel has redesigned its Classmate convertible netbook and tablet PC with an Intel Atom N450 "Pineview" processor, says eWEEK.

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