San Diego — Sony will break the size barrier for ultra-portable notebook computers with the introduction of the Vaio U750 next month.

The company describes the unit as a “pocketable” computer. With its 5-inch display and 1-pound weight it is more PDA-like in size than a notebook computer, but the U750 uses a 1.1GHZ Pentium M processor and features a 20GB hard drive, 512MB of memory, integrated Wi-Fi and a foldout keyboard. The unit’s suggested retail price is $2,000.