Operating System and Applications
The Simon used the file system from Datalight ROM-DOS along with file compression from Stacker. IBM created a unique touch-screen user interface for Simon; no DOS prompt existed.
The Simon could be upgraded to run third party applications either by inserting a PCMCIA card or by downloading an application to the phone's internal memory.
Atlanta, Georgia-based PDA Dimensions developed "DispatchIt", the only aftermarket, third-party application developed for Simon. The DispatchIt application costs were US$2,999 for the host PC software and US$299 for each Simon software client.
Read more about this topic: IBM Simon
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