When Intel has launched a new category of computing devices a few years back, the market has been poured with ultrabooks. Ultrabooks are battery-efficient, incredibly thin and with low-voltage processors. The processor is an Intel Core, not thicker than 0.83-inch and the battery lasts 5 hours at least. Windows 8 and 8.1 with their touchscreens have somewhat included "touchscreen" as another ultrabook spec.

If you are seeking an ultrabook, check out the list below featuring the 10 best ultrabooks in alphabetical order.

Acer Aspire S7-392-6411 ($1,449.99; Amazon - $1,241.97)

If you love a superslim laptop, yet you want to work well with Windows 8, go for the Acer Aspire S7-392-6411. It currently has the ultrabook trend, showing brilliance that PC makers can offer under the increasing Intel stringent ultrabook standards. It offers a powerful Intel Haswell fourth-generation processor, a stunning 1080p touchscreen display and a fast 128GB SSD. S7 also features a dazzling glass and white aluminum chassis, 0.51-inches thin and almost 9 hours of battery life.

Asus VivoBook S400CA-UH51 ($699; Amazon - $644.00)

You can have a Windows 8 fully functional ultrabook of the same cost with Asus VivoBook S400CA-UH51. This device seems to have everything set out right, including features and price.

Dell Inspiron 15z (I15Z-4801SLV) ($830; Dell - $599.99)

At the heavy end and thick of the ultrabooks specs come Dell Inspiron 15z (I15Z-4801SLV), offering extra features that justify its bulk. It is a great choice for a typical laptop user who seeks out for a new and fast laptop.

Dell XPS 12 ($1,299; Sears - $866.53)

If you have gone over with the screen acrobatics of Dell XPS 12, this convertible device is both laptop and tablet.

Gigabyte U2442T-CF1 ($1,299)

Whatever features of an ultrabook that a high-end power user wants, the Gigabyte U2442T-CF1 likely has them. Multimedia, 3D benchmark performance, a 10-point touchscreen and comfortable chassis and keyboard. Decide what tradeoffs you think are worth it.

HP Spectre 13T-3000 ($999.99)

A premium ultrabook with a non-premium price, the HP Spectre 13T-3000 is a wonderful option that is a reasonably priced technology offering great life for a battery, extra-wide trackpad and much more.

Lenovo ThinkPad Helix ($1,679; Lenovo - $1,343.20)

One of the better hybrid tablets today, Lenovo ThinkPad Helix offers a corporate user a prime tech device for the highly mobile workforce. If tablet and laptop are your needs, this ultrabook can be the best choice.

Lenovo ThinkPad X1 Carbon Touch ($1,684; Amazon - $1,589.99)

The Lenovo ThinkPad X1 Carbon Touch is an ultrabook for the executives. It is slim with attractive carbon fiber build and a power enough to edit and view large spreadsheets.

Lenovo ThinkPad X240 ($1,495; Lenovo - $1,311)

The Lenovo ThinkPad X240 is a business laptop that highlights a CPU with Core i5 Hasell, a touchscreen display of 12.5-inch IPS and speedy solid-state drive. You will pay quite a price, but in return, you have more than 15 hours of battery life.

Samsung ATIV Book 9 Plus ($1,399.99)

The ultrabook from the Korean giant phone maker, the Samsung ATIV Book 9 Plus goes toe-to-toe with the best ultrabooks and tops it off with its shocking high-resolution display.