Software

Qatar virus tracing app stirs rare privacy backlash

Privacy concerns over Qatar's coronavirus contact tracing app, a tool that is mandatory on pain of prison, have prompted a rare backlash and forced officials to offer reassurance and concessions.

Consumer & Gadgets

Review: Galaxy Z Flip: After 3 months, I can't stop using it

Last year, if you told me about all the things that would happen in 2020, I'd shake my head with disbelief. This includes the fact that I'd like the Galaxy Z Flip foldable phone. When it launched in February I was skeptical ...

Consumer & Gadgets

First peek at Microsoft's Surface Duo smartphone

Details about Microsoft's long-awaited Surface Duo smartphone have been sparse since word of its existence was reported last fall. But the first specs have now been released.

Electronics & Semiconductors

Simple method for measuring the state of lithium-ion batteries

Rechargeable batteries are at the heart of many new technologies involving, for example, the increased use of renewable energies. More specifically, they are employed to power electric vehicles, cell phones, and laptops. ...

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Telephone

The telephone (from the Greek: τῆλε, tēle, "far" and φωνή, phōnē, "voice") is a telecommunications device that transmits and receives sound, most commonly the human voice. It is one of the most common household appliances in the developed world, and has long been considered indispensable to business, industry and government. The word "telephone" has been adapted to many languages and is widely recognized around the world.

The device operates principally by converting sound waves into electrical signals, and electrical signals into sound waves. Such signals when conveyed through telephone networks — and often converted to electronic and/or optical signals — enable nearly every telephone user to communicate with nearly every other worldwide. Graphic symbols used to designate telephone service or phone-related information in print, signage, and other media include ℡, ☎, ☏, and ✆.

This text uses material from Wikipedia, licensed under CC BY-SA