DIAD I - 1990

• Electronically captured delivery information, including signatures.
• Delivery information uploaded at end-of-day upon return to UPS.
• Scanned bar codes.
• Programmed route and maintained timecard information.
• Tallied CODs.
• 0.75 megabytes of memory.

DIAD II - 1993

• Delivery information uploaded real-time through in-vehicle cellular service.
• Conduit for two-way communications in vehicle.
• Incorporated driver recommendations for design and ease of use.
• Smaller and lighter.
• 100 percent more memory (1.5 megabytes).
• Back-lit keyboard.

DIAD III - 1999

• First device in industry to both capture and transmit real-time delivery information.
• Enables two-way communication away from vehicle.
• Three ways to transmit real-time delivery information:
• Internal packet data radio.
• In-vehicle cellular service.
• Built-in automatic dialer for traditional telephone transmission.
• Faster processor, with memory increased more than four times (6.5 megabytes).
• Global keyboard glows in the dark.
• Modular architecture enables easy upgrading of individual components.

DIAD IV - 2004

• First device in industry to use Bluetooth, WiFi and GPRS or CDMA connectivity options.
• Introduces Global Positioning Satellite to handheld computer market.

• Color screen easier to read and facilitates color-coded messages to drivers.
• Acoustical modem facilitates dial-up access if necessary.
• Expanded memory (128 megabytes) positions for future services.
• Continued ergonomic improvement with driver input, e.g., lighter, curved design.

DIAD V – 2010

• First device in industry to switch on-the-fly between cellular carriers independent of cellular technology
• 2D imager scanner
• Color, auto-focus flash camera enhances proof-of-delivery and helps resolve customer claims
• Faster WiFi support (600 mbps) enables larger and richer content downloads such as training videos
• Expanded memory (1GB flash + memory card) to support driving training and future applications like navigation.
• About half the size (3.5") and weight (1.3 pounds) of DIAD IV.