Engineering

Extracting high-purity gold from electrical and electronic waste

Korea relies on imports for most of its metal resources, and in recent years, due to resource depletion and rising raw material prices, 'circular resources' that recycle waste metal resources have emerged. In response, SK ...

Business

X owner Musk says opposed to US ban of competitor TikTok

Elon Musk on Friday came out against banning TikTok in the United States, even if it would mean less competition for his social media platform X, formerly Twitter, as the initiative sees fresh bipartisan momentum in Congress.

Business

US Congress to take on TikTok ban bill—again

The US House of Representatives will again vote Saturday on a bill that would force TikTok to divest from Chinese parent company ByteDance or face a nationwide ban.

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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