Psion Plc, the London-based palmtop computer maker and operating system developer, has reported net profits for the year to December 31 up 142.1% at 18.6m pounds on revenue that rose 12.5% to 159.8m pounds. At the pre-tax level, profits were up 103.5% at 23.2m pounds. Earnings per share rose 139.5% to 24.27 pence.