Sometime after computers became common I generated lists of my most commonly called numbers and put them on folded paper to carry with me in my pocket.
What was unambiguously true for my Rolodex and my paper 'short' list was that all the names were arranged alphabetically by last name.
Big news: starting a few years back most names, especially on phones and email contact lists, have become arranged alphabetically by first name.
Good lord... who figured this out? Its fine with me but it is truly a revolution in our behavior and I'd like to know how it happened.