Modems, fax modems, printers and other peripherals may also be connected via industry-standard serial and parallel interfaces. Optional link facilities can connect the Series 3 to desktop machines, allowing data backup and access to the resources of the larger machine from the Series 3. The sophisticated operating system, the hardware, the built-in programming language, and the options to program in C and assembler make them excellent general-purpose computers, with the major benefits of compactness and battery endurance. The quality of the built-in applications, coupled with the power saving hardware make Series 3's excellent personal organisers. Though packaged as personal organisers, they are fully general, programmable, powerful computers. The Psion Series 3 and 3a are palmtop computers. Refer to the hardware section to see what you lose on the Series 3. I will describe the more advanced 3a here. INTRODUCTORY INFORMATION 1.1 What is the Psion Series 3/3a?
