My wife teaches teachers. That means books - lots of big, heavy textbooks and teacher’s editions. She’s also a doctoral student. That means stacks of journals and reams of printed articles, plus more books not to mention several pounds of Mac stuff. As a result she has injured her shoulder quite badly. It’s “just” a pulled muscle but she’s in constant pain and has been for a few weeks. And her book bags weigh less than many travelers’ carry-on luggage. Frightening. Are wheels the answer? No, she started with a wheeled bag but it grew so heavy she could hardly get in the the car. The only hope may be some future Kindle-type product that can easily capture all types of content including databases, journals, and works from small academic presses.