big whatsit said
"IBM tried to headhunt my dad during the 80's and I remember him joking that he wouldn't work for a bunch of Mormons who wouldn't let him wear brightly coloured ties to work. "
This is the first time I have heard mention that Tom Watson was a Mormon. I have not found any reference to this.
He was a Democrat and ran the company as if it was an evangelizing religion - if any thing the religion was IBM.
By the 80s alcohol was available on IBM property in canteens in in European where it was part of the local tradition, It was also supplied at social events in 70s in the UK, but probably not in the US. I went to a conference held at the IBM Endicott Country Club in 76 and it was dry - if not very dry.
As for Mormon business leaders, they include Bill Marriott and son - (of Marriott Hotel fame) - I also think that the owner of the Wordperfect Word processor company was a Mormon - his company was based in Orem in Utah.