What if you could carry the entirety of Wikipedia in your pocket, ready to access without a single bar of Wi-Fi or a hint of cellular signal? Picture a remote classroom in a rural village, a disaster ...

If you’re an audiophile or you’re just really into music, chances are you’ve seen network media players that stream local music files and online music services to your Hi-Fi speakers — and you’ve also ...

A reliable indicator of the air quality in offices, classrooms, or living rooms is the CO2 content. In fresh air, the concentration of carbon dioxide is around 400 ppm. This stands for “parts per ...