UPS has unveiled a new generation of the wireless, handheld computers that will be used by its drivers.

The fourth generation of the Delivery Information Acquisition Device, or DIAD IV, incorporates three different types of radio communication links that allow it to correspond almost anywhere, have expanded memory, and has a color screen that allows alert messages to be color-coded for drivers.

"This technology will enable our drivers to provide even better service to our customers," said Ken Lacy, UPS's CIO. "It will make us more efficient and reliable while reducing errors."

DIAD IV will be the first handheld computer to include built-in wireless connectivity options for personal, local or wide-area networks.