Do you have any favorites of that era that you consider to be deeply overlooked and rarely if ever mentioned or maybe containing ideas that barely if ever been implemented in practice in software or hardware but still have huge practical potential even in modern times? Or maybe some gems that never been translated to English?

Any CS/computer engineering topic is welcomed - operating systems, database management systems, computer algebra systems, general algorithmic topics, hardware design, CAD/CAM, pattern matching, computer graphics, whatever floats your boat.