ACM’s last code of ethics was adopted in 1992, when many people saw computing work as purely technical. The internet was in its infancy and people were just beginning to understand the value of being able to aggregate and distribute information widely.
I think it's interesting that the concern for ethics in computing has been a cause for concern since the 1990s. Although it wasn't as expansive as it is today, it was still something people were careful about. I think that's fascinating, but not as fascinating as the line "including for organist guilds." THERE'S A CODE OF ETHICS FOR ORGANISTS. I don't know what I'm going to do with this information but it is fascinating nonetheless.