HP-67 versus TI-58

[Josef]

The HP-67 program is shorter (39 instructions) and, in my opinion, more efficient, but the TI-58 is significantly faster at 51 instructions. For HP, I like the RPN, and by the way, the HP-65 was in space on the Apollo for the Soyuz approach and orientation calculations. Texas Instruments failed to do that even though they supplied the electronic circuits and instruments for the Apollo program. Admittedly, the TI-58 was introduced for sale a year later than the HP-67. I'll compare the HP-65 and HP-67 again, two years of development will surely make a difference.