I wonder what AKS stands for
The Synthesizer was the Synthi A, I guess A stood for the first model? You could order just the Synthi A if you liked, and most early models were just the A. The KS stood for Keyboard and Sequencer that they later designed that sat in the top lid. Here's a picture of an Synthi AKS:
I use to own two Synthi As with a cricklewood keyboard That I bought off of Richard Burmer (if you know who that is), here's a picture of a Synthi with that keyboard:
The cricklewood had an extra oscillator that you could use as an LFO. I use to hook both of them up together and make all kinds of strange noises. They weren't very good at playing melodic stuff as the voltages drifted too much, but they could make really cool sounds, most of the weird sounds on my first album were from the Synthis.