A computer system including telephone functionality. The computer system includes a first keyboard and a first display. The computer system also includes a processor having at least a first functional unit and a second functional unit, and further includes a phone portion. The computer system may operate in a first mode, a second mode, or a third mode. In the first mode, only the phone portion is activated. In the second mode, the phone portion and first functional unit of the processor are activated. In the third mode, each of the phone portion, the first functional unit, and the second functional unit are activated.