Drawing two conclusions on pen computers

In a modern version of David and Goliath, backers of hand-held pen computers hope to make serious inroads against well-established computer workstations. A start-up company, Practice Technology Inc., wants to build information networks based on pen computing. But it's going up against well-established network vendors that are relying on PC-based systems. Meanwhile, two pen computer manufacturers have stopped producing those devices, citing lack of demand.