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PC vs. Mac – PCs have been the dominant operating system for over two decades, but Macs are quietly making inroads and attracting new users. PCs offer a robust platform with abundant software and hardware resources, but require a more powerful computer to run the bulky operating system smoothly. Macs are known for their easy-going performance, but it may be more difficult to find a wide range of compatible hardware and software. Each platform has its adherents, and increasingly the difference is not based on performance, but personal preference.
CPU/Processor – This is where the raw computing activity of a computer takes place, measured in GHz. A speedier CPU means faster-running programs, but usually it also means lower battery life and a more expensive laptop. All-purpose and desktop-replacement laptops offer both dual-core and quad-core CPUs in a range of speeds, such as Intel's Core i3. Low-cost Netbooks, however, use single-core CPUs, such as Intel's Atom. Usually, more cache and higher clock speeds are better, but any CPU over 2.0GHz is fast enough to handle all the basic stuff, like playing music, surfing the Web and playing Web games, displaying online video, and managing e-mail.
RAM – 2GB is standard, and enough to deliver acceptable speed. 4GB of RAM offers a big leap forward in performance, particularly for multi-media and Internet-centric uses – luckily for consumers, prices continue to drop and better-performing laptops are very affordable.
Hard Drive – This is the primary storage device of a laptop. Entry level models will generally feature a 250GB hard drive, 320GB is a standard size, and larger hard drives provide 500GB of storage and more. If you anticipate storing numerous pictures, movies, MP3 files, or others memory-intensive items, you will want a larger hard drive. But you should beware of that capacity alone does not make a good hard drive. The hard drive's rotational speed is a good measure of the drive's performance. A 7,200rpm laptop disk delivers significantly faster performance than a 5,400rpm model, but unfortunately a faster drive may also shorten your laptop's battery life a little bit.
Battery Life – This is an important consideration for many users, since the main attraction of laptops is the ability to take and use them anywhere. In general, less advanced models are more energy efficient and allow for longer battery life, while more powerful models gobble power will require more frequent charging. If you're wary of the extra bulk that a larger battery is needed, try to get a backup battery. They are well worth the money if you plan to regularly spend more than two to three hours away from a wall outlet.
Screen Size – Buying a laptop used to mean putting up with a tiny screen with a dim, washed out display, but that is no longer the case. Most laptops feature screens in the 11”-15” range, and today's LCD displays are bright and vibrant. Large screen (15”+) laptops are now available, but do come with diminished portability and battery life.
Mobile Broadband – If your travels a lot which takes you beyond the reach of Wi-Fi hot spots, you may want to setup a built-in mobile broadband antenna for your laptop (the terms WWAN or 3G are also often used for this type of connection). Business and recreational users are able to use the internet through a mobile broadband laptop wherever they can get a mobile phone signal. These antennas let you tap in to a cellular provider's data network. What was once slow, limited quality internet accessed through mobile phones or PDA’s is now high-speed broadband access using a mobile broadband laptop. Meanwhile the technology has its downsides: data plans still tend to be pricey; although the speed is improving, they are still slower than most high-speed Internet connections; and your built-in cellular card can typically work with only one cellular provider.