Shareware Registration - Best described as "try before you buy" software. Customers can either use the program for a limited amount of time or they are able to try a "crippled" version of the product. In both cases, the customer must register (pay for) the product in order to utilize all of its features for an unlimited time. Applications that use shareware registration often require an "unlock key" after purchase.

Pocket PC - Mobile operating system developed by Microsoftr, which runs on third party devices.

Stylus - A pen-like pointing and writing device for handheld computers. Writes directly on the screen.

Document reader - A program to read documents on the handheld computer

PDB - Palm Database: Used in conjunction with PRCs to hold content used in Palm OS applications.

BOBO - Billing On Behalf Of: A billing method often utilized by wireless carriers and mobile operators allowing charges for digital content to be integrated into the customer's monthly bill.

Pixel - The smallest unit of color on a computer screen. High resolution devices have more pixels per square inch.

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