RING was developed and built at The Tyrell Institute. Tyrell Corporation was the company which created the android replicants in Blade Runner (1982).
R.I.N.G. stands for Robomatic Internalized Nerve Ganglia.
When the police are chasing the android, the theater marquee shows they're playing a film called The Fever, the same picture was also playing in the previous episode, Horror in the Heights (1974).
This episode first aired Jan 10, 1975. The January 1975 issue of Popular Electronics featured the first story on the Altair 8800 computer. That issue is also said to have inspired Bill Gates and Paul Allen to form Microsoft to write software for the new computer. So this episode is quite prescient in talking about microelectronics.