The IBM System/360 was a groundbreaking family of mainframe computers announced on April 7, 1964. Designing the System/360 was an extremely risky “bet-the-company” project for IBM, costing over $5 billion. Although the project ran into severe problems, especially with the software, it was a huge success, one of the top three business accomplishments of all time. System/360 set the direction of the computer industry for decades and popularized features such as the byte, 32-bit words, microcode, and standardized interfaces. The S/360 architecture was so successful that it is still supported by IBM’s latest z/Architecture mainframes, 55 years later.

The lower part of the Model 30 console was used for operator intervention. Note the binary-to-hexadecimal conversion chart below the hexadecimal dials.

While we’re looking: http://www.righto.com/2019/04/a-look-at-ibm-s360-core-memory-in-1960s.html