Ahh Memories. I actually did some playing on the moog back in the 70's. Patch cords and all. The last of that generation I worked with was the Arp 2600. I remember reading the manual about 20 times before I even turned it on. I think that generation of keyboards is what made the first of the next generation (Yamaha DX7) such an interesting transition. You actually had to understand the theory of the acoustics of the actual sound and then how the electronic instrument modeled those acoustics with waveforms, FM operators, ect. to get the desired effect. I remember being at the rollout of the DX7 and how you could learn to listen to recognize the beat oscillation of a single violin note. Now we use samples. Much to our benefit for realistic acoustic sounds.

As for the IBM. I knew that one too. Nothing better than to see the expression on someone's face when you shuffled their punch cards.