Dunno about those two, so I can't say, but due to
their size, the Tandy
Pocket computer series were all pretty bad (understandably...) but I
/think/ it was the PC-5 that was pretty much a portrait calculator w/a
I think that was the PC7. It had a membrane-type ABC-layout keyboard in
the flap of the case with a conventional-ish calculator keyboard on the
machine itself (you weren't suppoed to be able to take the machine out of
the case, of course, in practice you could if you flipped off a plastic
cover strip and undid some screws which clamped the keyboard tail against
the PCB in the calcluator).
The PC6 was landscape format clamshell with rubber buttons in the lower
half for digits and claculator functions and a membrane strip with a
QWERTY layout in the top part, along with the display. I _hated_ that
machine (and not just because of the keyboard).
Both were made by Casio I think.
IMHO the only decent _pocket_ computer keyboard (feel, layout, etc) was
the HP71. The HP75 is a close second.
-tony