Multiline HP15C

[rprosperi]

(06-10-2018 02:11 PM)Thomas Radtke Wrote:  I wonder why it was called 15S. The 15C has brought non-menu, 7-segment character calculators really to the highest possible degree while maintaining user friendlyness. Doesn't make much sense to evolve something from it.

It appears to be more like an RPL-approach.

The "S" was for Scientific. By the time this was created, "Constant"/"Continuous" memory could be assumed.

As this design came from Walter, it is certain that it's not in any way RPL. This was an early concept when the core 34S design was looking for a new target machine, well before the DM42 was known to be coming.