Excuse me if it's off topic - perhaps you can advise where I can ask then.

In childhood I used to program on MK-61 soviet calculator. It had 4 operating registers (X, Y, Z, T) and 15 storage registers. Program could have 105 steps. As I recall it had commands like:

• swap X and Y registers
• shift registers (Z to T, Y to Z, X to Y)
• copy from storage register (1..15) to X
• copy from X to storage register (1..15)
• if X < 0 then go to program step ##
• perform operation (+, -, *, /) using X and Y values and put result to X
• etc

Q: Is this command set an assembly language? Did I have a basic idea of assembly languages using this device?