The encyclopedia · Software & IT · Technical decision · 1991–1993
UPS put the first handheld computer in drivers' hands: the DIAD, 1991
UPS equipped every driver with a DIAD in 1991—capturing signatures and scanning barcodes on the spot—so delivery proof moved from paper to data, in real time.
UPS (United Parcel Service)
the move
In 1991 UPS developed and deployed the Delivery Information Acquisition Device (DIAD)—the package delivery industry's first handheld computer. DIAD I captured signatures electronically, scanned barcodes, tallied CODs and kept route and timecard information, uploading everything when the driver returned to the facility.
Two years later DIAD II made delivery data upload in real time through in-vehicle cellular service and gave drivers two-way communication, so UPS knew a package's status while the truck was still on route. UPS's own history says the DIAD 'revolutionized the package delivery business.'
The device turned the driver's street-level data into network data: proof of delivery, scan history and route facts became available the moment they happened, not at end of shift. By the fifth generation, about 100,000 DIADs operate in more than 100 countries.
why it works
- Paper logs arrived at the office hours after the event; the DIAD captured data at the door.
- Barcode scans made each package's location and status machine-readable.
- Real-time upload turned internal records into customer-visible tracking.
- Rugged design let the device survive years of daily courier use.
what transfers
Capture operational truth at the point of action, not later at the office: data collected at the doorstep is more accurate, and uploaded instantly it becomes a customer-facing service.
what came after
DIAD evolved through five generations (DIAD V is about half the size and weight of DIAD IV, with cellular carrier switching), remains the data spine of UPS's tracking, and set the pattern for handhelds across the delivery industry.
references
- The Evolution of the UPS Delivery Information Acquisition Device (DIAD)
- UPS Malaysia equips drivers with new handhelds
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