Magnetic Card Questions

[AndiGer]

Basically you can use the same type of magnetic cards in both machines.
But: Written cards for HP-65 and HP-67/-97 are not interchangable. So - a card written in an HP-65 can't be read by a HP-67/-97 and vice versa. The only compatibility is HP-67/-97 cards in the HP-41 card reader (but there some limits) - and the card reader must be attached when running HP-67/-97 programs.
Respecting the magnetic cards HP-67 and HP-97 are fully compatible.