Memory Moog

The Moog company pioneered the commercial manufacture of modular voltage-controlled analog synthesizer systems in the mid 1960s. The technological development that led to the creation of the Moog synthesizer was the invention of the transistor, which enabled researchers like Moog to build electronic music systems that were considerably smaller, cheaper and far more reliable than earlier vacuum tube-based systems.

The Moog synthesizer gained wider attention in the music industry after it was demonstrated at the Monterey International Pop Festival in 1967. [Source: Wikipedia]

Moog schematics

http://www.freeinfosociety.com/electronics/schempage.php?cat=1

 

Moog Pricelist 1980

Moog Pricelist 1980 p 2

Moog guitar