Correction for the amount of a Walmart's Mainframe
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How much is 560,000,000 megabytes?
It's about one-and-one-fifth times as much as a Walmart's Mainframe
The amount of a Walmart's Mainframe is about 480,000,000 megabytes.
(a.k.a. Wal-Mart, a.k.a. Wal-Mart Stores, Inc) (2004 figures)
As of 2004, Walmart had accumulated nearly 460 terabytes of data about its customers, inventory, products, and sales. According to some estimates, the total area of all Walmart stores in the United States measures 64,000,000 sq. m.