Anyone still use a HP-28S ?? (Score 1)

This was my first real calculator 20 years ago. IMHO it had the best UI and keyboard layout ever! It was also very fast and responsive -there was a little hack that made it use both of its 2 micros to make it twice as fast. Furthermore, it had virtually all of the graphing capability of the HP-48 on a smaller screen. It was a rugged unit, but was more fragile because of its clam-shell construction. After dropping it once too often, the plastic around the battery compartment fell apart. Its main drawback was a lack of a data input port. I would be happy to pay big $$ for a new calculator based on this design.

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