He said Dell's customers are telling the company they prefer the idea of mobile Internet access via wireless notebook computers, using technology such as the Bluetooth and 802.11 standards as well as emerging wireless telecommunications technology such as GPRS (General Packet Radio Service), wideband CDMA (Code Division Multiple Access) and UMTS (Universal Mobile Telecommunications System).

CNN: Dell: PCs, servers, storage to remain growth areas

Samsung has combined a full-color Palm operating system device with a code division multiple access (CDMA) phone.

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For those users, he recommends a system like Facebook, on which multiple users can access the same account, to varying degrees of authority, with their own unique accounts and passwords.

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Aviation experts contend that even if intruders were able to access a control tower and disrupt operations, the nation's air traffic control system is designed with multiple back-ups so that other facilities could pick up control of the affected air space.

CNN: Union claims security lax at many air control towers