As I was waiting for a table at a local restaurant the other day, I flipped through a couple of the free classified papers. I was shocked to realize how dependent I’ve grown on three simple features that just aren’t available in the analog world: search, sort and filter.

A design library is a collection of guidelines & standards that describe a design system and maybe template assets to go with it. Creating a library for an experience of any scale is no trivial matter. It's not like you open up a code editor, chop things up, throw a ZIP file to some marketer and say "Here you go. Enjoy!" You've got to have a plan.

superb article on social design patterns/anti-patterns

A person participating in a social structure expects to develop a reputation and hopes for insight into the reputations of others, but each designed model of participation and reputation embodies its own set of biases and incentive structures.