As I wrote at https://retrocomputing.stackexchange.com/a/11032/1932 https://retrocomputing.stackexchange.com/a/11032/1932 Charles A. Kiesling is the best that m

As I wrote at https://retrocomputing.stackexchange.com/a/11032/1932 https://retrocomputing.stackexchange.com/a/11032/1932 Charles A. Kiesling is the best that my research turns up, but xe might not have been the first. More importantly, however, and also as I wrote there, the blinking cursor has existed since at least 1965, and has not just turned 54 this year.