Top of Page Display types The types of displays used in handhelds are smaller versions of those used in notebook computers. Because handhelds are small, the display usually covers most of the front of the unit, so it's the most visible feature. It's important to have a display that's as bright and legible as possible on a handheld that is within your budget. Monochrome LCD is the least expensive and most energy-efficient choice, providing grayscale images and text. Handhelds normally ship with 512 KB of system RAM in credit card models and up to 32 MB in larger models, often with an option for ordering more.
Some models also provide expansion slots for more memory.
Some handhelds include slots for CompactFlash cards. There are two types of CompactFlash cards. Type II slots accept both Type I and Type II cards. Type II cards are 5.5 millimeters thick and used mostly as modems. A Type III slot holds one Type III card or one Type I and one Type II card.