HP-25 Subroutines possible?

[Matt Agajanian]

(06-29-2017 07:15 AM)Namir Wrote:  

(06-20-2017 06:16 PM)Matt Agajanian Wrote:  Given the tech advances from Classics to Woodstocks, would it have been possible to include three-levels of subroutine branching in the HP-25?

HP-33 = HP-25 + subroutines

Yeah. I remember that from the HP Digest
31E--HP-21 w. 3 more registers and Last X
32E---HP-45 w. Linear Regression, Normal & Inverse Normal Distribution and a total of 15 registers
HP-37E--HP-80 upgrade

Although not in the storyline, my thinking is the 34 was an HP-29C upgrade.