You walk in a library → You search the database → You locate the section the book is in → You look for the book → You pick it up ↵ You walk in a library → You look for a book → You locate the section the book is in → You search the shelf → You pick it up ↵ You walk in a library → You choose a random shelf → You play with the spines → You leave ↵ You walk in a library → You swipe your card → It’s expired → You leave ↵