That's actually a well researched bit of cash machine UED. I remember when I worked in the usability lab at a university in the UK this one came up. Most early

That's actually a well researched bit of cash machine UED. I remember when I worked in the usability lab at a university in the UK this one came up. Most early ATMs gave cash first and there was a significant minority of people who forget their cards. I can't remember the paper, but it's pretty essential to be people first in design, rather than engineering first.