Well, I bought a 35S some time ago, and I was really disappointed by its drawbacks. But since it's a very beautiful calculator, I've been using it for a self-imposed week.
One of the things that upset me was to hit XEQ A ENTER to start program A. But I discovered a trick I never read here (if I'm not the first, excuse me).
In the listing there should be something like:
PRGM TOP
0001 GTO B001
A001 "PROGRAM A"
A002 ...
...
A0XX RTN
B001 "PROGRAM B"
B002 ...
B0YY RTN
...
Now, if things are designed this way, it suffices hitting R/S to start program B. But if I want to use program A? Change only the first instruction into GTO A001, hit R/S a couple of times (to reset the program pointer, or reset it manually with GTO 0001) and from now on, hitting R/S will run program A. If you have another program, say Z, change the pointer to GTO Z001. Of course, any starting point is valid (e.g. GTO A031).
Do you think it's useful?
-- Antonio