I first learned to type on a keypunch machine in my father’s office. Well, perhaps “learned” is too strong a word. But I did produce much nonsense and some actual words on stacks of punch cards. I still have a few of them. Douglas W. Jones collects punch cards and his site has historical information and scans of his card collection. Many of them have corporate logos. He also has a page on chads and voting machines. Jones’ site was featured in a NY Times article about surviving use of punch card systems.