Difference between pocket computer and programmable calculator?

[Matt Agajanian]

SNIP

(09-08-2022 07:31 AM)C.Ret Wrote:  On the other hand, the HP-12C is a pocket computer as well as the HP-28C/S, no keys dedicated to SIN COS or TAN.
Likewise, the Ti58 and Ti59 are indeed pocket computers; in fact, to use their historical designation, pocket programmable!.

Some clarification, please.

First, in what way is the 12C a computer?

Next,
Having three, 41C, CV, and a 58C, I would consider the 41 family a computer. Since it can interface with a printer, barcode reader, card reader, a cassette storage drive, application modules, and even a TV video interface (HP-82163B), it seems the 41 is more a computer than the 58/59. Because the 58/59 can only interface with a thermal printer, software modules, and the card reader/writer (59), I would consider those a calculator. Next, even though it's an RPN calculator, right out of the box, its capabilities are analogous to a computer. Also, I would consider the 58/59 a calculator since its alphanumeric capability can only be accomplished through the printer wheras the alphanumeric capabilities on a 41 can be achieved not only from the printer, but also the display.