The problem is that this is practically prime material for the trolls to rally around. (n4g.com)
The cockpit is obsessed with making your experience more enjoyable than ever before with prime materials and intuitive technology. (briggsnissan.com)
The problem with PDFs is exactly the same as their strong point: They can be readily moved from one device to another, so they are prime material for pirates. (goodereader.com)