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Numbers

Interesting information from a UN report done last year about the use of cellular phones around the world.

By the end of last year there were an estimated 4.1bn mobile subscriptions, up from 1bn in 2002. That represents six in 10 of the world’s population, although it is hard to make a precise calculation about how many people actually use mobile phones.

Africa is the continent with the fastest growth, where penetration has soared from just one in 50 people at the turn of the century to 28%.

Much of the take-up is thought to have been driven by money transfer services that allow people without bank accounts to send money speedily and safely by text messages, which the recipient – typically a family member – can cash in at the other end. Vodafone’s M-Pesa money transfer service was launched in Kenya in 2007 and now has 5 million users.

The ITU report points to the Gambia, where mobile subscriptions have rocketed amid stiff competition among mobile operators. Out of almost a million telephone subscribers, there are more than 800,000 mobile subscriptions but only about 50,000 fixed telephone lines in service.

Developing countries now account for about two-thirds of the mobile phones in use, compared with less than half of subscriptions in 2002.

[From Guardian.co.uk]

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From TechCrunch

But the real number of streams/day, we’ve now confirmed with a source at Google, is above 1.2 billion/day worldwide. That matches what we’ve heard from other sources. That pretty much means everyone on the Internet, on average, is watching one YouTube video per day.

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How Many Active Facebook Users?

Facebook updated their public statistics with the number of active users on the site now over 130 million. The company also updated their advertising estimates provided to advertisers when creating an ad and the total number of users there adds up to more than 133 million users. Also of interest is that Facebook has grown [...]

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How the Telephone Keypad Came About

Here is an interesting article about how the telephone companies came about choosing the keypad configuration for dialing numbers.
Ever wonder who came up with the order of numbers on a telephone? Ever wonder why it isn’t the same as those on a calculator, or a keyboard, ascending from lowest to highest? After all, adding machines [...]

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Undulating Numbers

An undulating number is any number that has the form ababab… when in the base 10 number system. It is only considered after at least three digits, because otherwise all numbers below 100 would be undulating. The first 20 such numbers are: 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 202, 212, 222, [...]

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The First Automatic Calculator

“Wilhelm Schickard built the first automatic calculator called the “Calculating Clock” in 1623. Some 20 years later, in 1645, French philosopher Blaise Pascal invented the calculation device later known as Pascal’s calculator, which was used for taxes in France until 1799. The German philosopher G.W.v.Leibniz also produced a calculating machine.”
[wikipedia]

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English Books and ISBN Numbers

“If the ten digit number on the back of a book starts with a zero or a one, the book is written in English.”
[ISBN]

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World Population Numbers

“There are 6,720,580,927 people in the world as of 04:31 GMT (EST+5) Sep 01, 2008, 2006.”
http://www.census.gov/ipc/www/idb/worldpopinfo.html

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