A handheld computing unit includes a MMW transceiver, a hardware section, an operating system section, and an application section. When the handheld computing unit is in a extended mode: the hardware section is operably coupled to a hardware section of an extended computing unit; the operating system section is operably coupled to an operating system section of the extended computing unit; and the application section is operably coupled to an application section of the extended computing unit. When the handheld computing unit is in a network mode the hardware section is operably coupled to a hardware section of at least one other handheld computing unit.