Alpha JUNO series
Alpha JUNO-1 (JU-1): 49-keys without velocity. The Foot Controller can be used to control velocity and aftertouch. I think this is the rare ability as a MIDI master keyboard.
Roland HS-80 (1986)
Roland HS-10 (1985)
Roland PG-300 (1985)
JUNO series are made as entry models of DCO analog polyphonic synthesizer.
JUNO was made as a little sister of the Jupiter VCO polyphonic series, and had a very simplified architecture. Later another DCO series JX came out with more advanced synthesis engine.
Roland JUNO-6 (1981)
Roland JUNO-60 (1982)
Roland JUNO-106 (1984)
Roland JUNO-106S (1985)
Roland HS-60 (1985)
After comparing the sound of Alpha JUNO and MKS-7, I came to think that MKS-7 uses 2-pole LPF, while JUNO series use 4-pole.
It may not be correct to say that MKS-7 is a rackmount version of JUNO-106, and it's understandable that Roland never clarified how they are related.
Roland MKS-7 (1985)
Roland EM-101 (1986)
Alpha's competitor in those days were the lower-end models like YAMAHA DX21, KORG Poly-800, etc. But it was just the price and not the architecture.
The 1DCO with Sub-OSC engine was unique to JUNO, and Alpha's newly added comb/PWM waveforms were rarely found in other synths.
There are many software emulation of JUNO/Alpha JUNO, but I don't know if they have these Alpha waveforms.
Recently Roland released two JUNO-related synths. JUNO-D is a PCM synth that named after JUNO series. V-Synth has JUNO waveforms in the oscillator section.
Roland V-Synth (2003)
Roland JUNO-D (2004)
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Alpha JUNO
Deep Synthesis: Home9. 18. 2005