The first public presentation of UNIX was made at the Symposium on Operating Systems Principles at the IBM Research Center in Yorktown Heights in October of 1973. Dennis Ritchie is quoted as saying it was beautiful day, and Ken Thompson layered his own memories with a thick coating of modesty:The audience was several hundred. I was pretty nervous. The response was the normal, polite applause. I don't recall any questions.The IBM Research Center in Yorktown Heights, image from IBMIn contrast to T...