Learn One Thing A Day

The Dollar sign $ , where does it come from? The symbol started to appear in 1770 and there are at least two possible explanations for it. 1) The first one is that it is an abbreviation of the word "Pesos". The evolution would have been P eso s -> PS -> $ 2) Another alternative explanation is that $ comes from merging of the letters U and S, coming from USA . It is also said that it was introduced by Oliver Pollock, an American patriot, in 1778.   Wikipedia puts it nicely in a figure    More info on wikipedia :)

Have you ever wondered what WiFi stands for? (via  buzzfeed.com ) Well, short answer... it stands for NOTHING. Nothing, really! Disappointed? Don't be. Back in the 1999 people from the IEEE committee needed a catchy name for the what later became "WiFi" and they found it: WiFi. From  scientificamerican.com " Way back in 1999 the fledgling wireless industry needed a marketing name for the new products that conformed to the technical specifications called 'IEEE 802.11'. 'IEEE 802.11' didn't have much of a ring to it, and the industry association wanted a catchy name. They came up with wi-fi, and that's what's been used ever since. "It didn’t hurt that the name rhymes with 'hi-fi,' which was short for 'high fidelity,' a term that, back in the day, referred to high-quality sound systems. Some people even say that wi-fi therefore stands for 'wireless fidelity,' but those who were involved in t