https://www.allaboutcircuits.com/news/the-mos-6502-how-a-25-chip-sparked-a-computer-revolution/
According to many 50 years ago on September 16, 1975, MOS Technology showed the 6502 at WESCON
https://www.allaboutcircuits.com/news/the-mos-6502-how-a-25-chip-sparked-a-computer-revolution/
According to many 50 years ago on September 16, 1975, MOS Technology showed the 6502 at WESCON