https://www.theguardian.com/technology/2018/feb/28/amazon-buys-video-doorbell-ring-smart-home-delivery >Smart doorbell maker is retailer’s second largest acquisition as it pushes further into in-home deliveries and internet of things >Amazon has acquired video doorbell and home security camera maker Ring in a deal reportedly worth more than $1bn, as it pushes further into the internet of things and in-home-delivery space.