Target and Amazon are at war. Target is going to stop selling the Amazon Kindle in its stores. The issue seems to be a practice known as "showrooming." That's when a web retailer like Amazon encourages customers to go to a store like Target, scan the barcode of an item with a smartphone, then see if they can get it cheaper online. Maybe buy it from Amazon while they're standing in Target. Showrooming is on the rise, and retailers are getting nervous. Also, email and the stress levels of workers in an office environment.