Laptop is divided into several category according to its use and user.Such as Netbook is dedicated to net surfing while excluding other feature.RUGGED LAPTOP can sustain rough condition while subnotebook is dedicated to portability. - Desktop replacement – emphasizes performance, is less portable, 15" and larger screen;
- Standard laptop – balances portability and features, 13-15" screen;
- Subnotebook – emphasizes portability, has fewer features, 13" or smaller screen.
By features:
- Budget – a cheap, lower-performance standard-sized laptop;
- Tablet PC – Has a touch-screen interface, may or may not have a keyboard;
- Netbook – A cheaper, smaller version of a subnotebook suited to Internet surfing and basic office applications.
- Rugged – Engineered to operate in tough conditions (strong vibrations, extreme temperatures, wet and dusty environments).
desktop replacement computer-A desktop replacement computer is a laptop that provides most of the capabilities of a desktop computer, with a similar level of performance.
Size-Desktop replacements are usually larger and heavier than standard laptops.
Ports-They contain more powerful components and numerous ports, and have a 15.4" or larger display.
portability-Because of their bulk, they are not as portable as other laptops and their operation time on batteries is typically shorter.
desknotes-Some laptops in this class use a limited range of desktop components to provide better performance for the same price at the expense of battery life; in a few of those models, there is no battery at all and the laptop can only be used when plugged in. These are sometimes called desknotes
Subnotebook-
subnotebook- A subnotebook, also called an ultraportable by some vendors, is a laptop designed and marketed with an emphasis on portability (small size, low weight and long battery life) that retains the performance of a standard notebook.
Weight- Subnotebooks are usually smaller and lighter than standard laptops, weighing between 0.8 and 2 kg (2 to 5 pounds);
Battery life- the battery life can exceed 10 hours when a large battery or an additional battery pack is installed.
To achieve the size and weight reductions, ultraportables use high resolution 13" and smaller screens (down to 6.4"), have relatively few ports, employ expensive components designed for minimal size and best power efficiency, and utilize advanced materials and construction methods. Some subnotebooks achieve a further portability improvement by omitting an optical/removable media drive; in this case they may be paired with a docking station that contains the drive and optionally more ports or an additional battery.
The term "subnotebook" is usually reserved to laptops that run general-purpose desktop operating systems such as Windows, Linux or Mac OS X, rather than specialized software such as Windows CE, Palm OS or Internet Tablet OS.
| Developer | AsusTeK Computer Inc. |
|---|---|
| Type | Subnotebook/Netbook |
| Operating system | Xandros Linux Microsoft Windows XP |
| Website | http://eeepc.asus.com |
Netbooks are laptops that are light-weight, economical, energy-efficient and especially suited for wireless communication and Internet access. Hence the name netbook (as "the device excels in web-based computing performance") rather than notebook which pertains to size.
Especially suited for web browsing and e-mailing, netbooks "rely heavily on the Internet for remote access to web-based applications and are targeted increasingly at cloud computing users who rely on servers and require a less powerful client computer..
Weight and Size-While the devices range in size from below 5 inches to over 12, most are between 7 and 11 inches and weigh between 2 and 3 pounds.
Operating system-Netbooks have a wide range of light-weight operating systems including Linux and Windows XP rather than more resource-intensive operating systems like Windows Vista as they have less processing power than traditional laptops.
Rugged Laptop- for rough and tough use
Panasonic Toughbook in use by U.S. Navy 
Panasonic Toughbook CF-M34 Design feature-The design features found in rugged laptops include rubber sheeting under the keyboard keys, sealed port and connector covers, passive cooling, superbright displays easily readable in daylight, cases and frames made of magnesium alloys or have a magnesium alloy rollcage that are much stronger than plastic found in commercial laptops and solid-state storage devices or hard disc drives that are shock mounted to withstand constant vibrations.
User-Rugged laptops are commonly used by public safety services (police, fire and medical emergency), military, utilities, field service technicians, construction, mining and oil drilling personnel. Rugged laptops are usually sold to organizations, rather than individuals, and are rarely marketed via retail channels.
