What makes "FOCAL" FOCAL?

[Steve Simpkin]

(04-11-2020 05:52 AM)Valentin Albillo Wrote:  

(04-11-2020 03:16 AM)rprosperi Wrote:  The only machine one might make a case for would be the HP-42S (and Free42, DM42, etc.), and this likely has been used by some folks in some cases since it is nearly identical.

Save for I/O, the HP42S isn't "nearly identical" but vastly superior in every aspect.
V.

It is a real shame that HP didn't at least put an IR receiver in the HP-42S so it could do two-way communications like the later HP-48SX model did. Even limited I/O would have been better than none.