by Kevin Spark
Every file on a computer, from movies to the operating system itself, is stored as a series of bits. Modern computers typically come with hard drives that have dozens or hundreds of gigabytes, but it hasn’t always been that way. This article will describe the various size metrics and the amount of data that will fit in each.
A bit is the smallest unit of data – it stores a binary decision, either a zero or a one. 8 bits make up a byte, which can store a single character of text.
1000 bytes make up a kilobyte, equivalent to about half of a typewritten page.
1000 kilobytes make up a megabyte, about enough data to store a short novel.
1000 megabytes equals 1 gigabyte, which can store a pickup truck’s worth of books.
1000 gigabytes makes up a terabyte – if you cut down 50,000 trees, turned them into paper, and printed on them, it would fit into a terabyte. The U.S. Library of Congress would take about 10 terabytes of data to store.
1000 terabytes equals a petabyte, which can store about half of all of the academic research libraries in the United States.
1000 petabytes makes up an exabyte – about half of all information generated in the year 1999.
1000 exabytes total a zettabyte – by 2011, it is predicted that all digital information in the world will take approximately 1.8 zettabytes.
1000 zettabytes make up a yottabyte – if there were such thing as a 1 yottabyte file, you’d need 86 trillion years to download it. Well, that depends on your download speed of course, but that’s a lot of data!
Source: Techtarget.com, Wikipedia, Wordspy.com
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