thumb|Psion Series 3 In 1987, Psion began developing its SIxteen Bit Organiser (SIBO) family of devices and its own new multitasking operating system named EPOC, to run its third generation product, Laptops (MC), industrial handhelds (HC and Workabout) and PDA (Series 3) products.
thumb|psion series 3 in 1987 psion began developing its sixteen bit organiser (sibo) family of devices and its own new multitasking operating system named epoc to run its third generation product laptops (mc) industrial handhelds (hc and workabout) and pda (series 3) products