How Does a Handheld Computer Work?

The Basics

"Handheld computer" is a general term for any kind of portable device that mimics the features and functionality of a standard personal computer. Most of these devices are designed not only to be held in the palm of your hand but carried in your pocket. Handheld computers come standard with either a touch-based screen or a tiny keyboard. They are often powered by some form of battery, aiding to their portability.

iPhone

Perhaps the most popular example of a handheld computer available today is Apple's iPhone. The iPhone packs the functionality of a handheld computer, from productivity software to Internet connectivity to media playing. Using a computer with iTunes installed or a wireless Internet connection, iPhone users can connect to the iTunes Application Store and download thousands of different apps that allow them to do anything from keep a to-do list to play a game of blackjack.

PDAs

Another type of handheld computer is a personal data assistant, or PDA. They are also known as palm-top computers. PDAs generally are more productivity-centric than Apple's iPod (which is more for entertainment), and many can be used as both cellular phones and Web browsers in addition to data-entry devices. Most PDAs on the market can connect to the Internet wirelessly, enabling you to quickly and easily access the Internet from the palm of your hand.