Optimum HDTV viewing distance

src: thumbor.forbes.com Optimum HDTV viewing distance is the distance that provides the viewer with the optimum immersive visual HDTV experi...

Telescopic sight

src: upload.wikimedia.org A telescopic sight , commonly called a scope , is an optical sighting device that is based on a refracting telesco...

Activity tracker

src: www.3-dflyer.com An activity tracker , also known as a fitness tracker , is a device or application for monitoring and tracking fitness...

Florence-Rome high-speed railway

src: www.benedictsbus.com The Florence-Rome high-speed railway line is a link in the Italian high-speed rail network. It is known as the fe...