OREGON PRISONS Oregon prisons ban dozens of technology and programming books over security concerns Introductory books on Windows 10, blockchain technology and iOS development are among more than 1,600 titles inmates can't receive in the mail. By Rachel Alexander – Salem Reporter June 18, 2019 at 2:17pm Read this article for free. Sign up for a free trial. It’s fast and easy. No credit card needed. Log in if you have a subscription. Want to skip the trial? Subscribe. If you are a human, ignore this field Looks like you already have an account. Log in.