Add to Cart buttons
Here’s a nice study from Get Elastic of how different companies design their Add to Cart buttons, all linked to their actual shopping carts. There’s even statistics. Of the 111 “shopping cart” buttons, 58% use the phrase “Add to Cart” while the rest is a mishmash.
This is a great example of how the language of new technologies waffle over a time until settling on a winning phrase. It’s almost a folksonomy of shopping cart buttons.