They tote a computerized clipboard called a DIAD (Delivery Information AcquisitionDevice), which houses an internal radio that simultaneously captures and transmits delivery information.
Many speculators point to this as yet more proof that Google is working on a mobile handheld device following the company's acquisition of a company founded by wireless designer Andy Rubin.
But the company is looking to shift into the cellphone infrastructure behind the device, such as cell towers, and has already made one acquisition to show its intent.