Dane here. I have a few more to the list (and surely many I forgot): - You mentioned Peter Naur, but I must point out that he's the 'N' in BNF - Per Brinch Ha

Dane here. I have a few more to the list (and surely many I forgot): - You mentioned Peter Naur, but I must point out that he's the 'N' in BNF - Per Brinch Hansen (concurrent Pascal, brought us monitors) - Ole Lehrmann (BETA) ... I think it's a network effect. Early practitioners in Denmark had a PL focus and fostered the next generation.