The plan initially suggested when Labour was in government was for a giant database to store the details of all mobile phone calls and internet traffic, such as who called who, or who emailed who when, but not the content of the phone calls or emails.

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Safeway, a Britain-based retailer, built a 2-terabyte database with IBM to store almost four years' worth of customer data.

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The entire crowd-sourced database is too big to store on an iPhone, so we download an appropriate subset (cache) onto each iPhone.

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Over time, this database will create a powerful incentive to keep shopping at the store where your style database resides.

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While FINRA has historically played a key role in combating insider trading, the SEC recently unveiled plans to develop a centralized database that would store information on every single trade order, execution, and cancellation across across numerous equity and options trading markets.

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CouponMom.com created a grocery coupon database that matches coupons with grocery store circulars to save users time in figuring out if an item for which they have a coupon is also on sale.

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Its president, Garrison Hoffman , wrote the e-mail time capsule application and designed the database that will store the messages, so we know he has the expertise to keep it running.

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"They all find out that you opened the mail and they get an invisible tracking number, so if you go to a store ... that number is reported to them and they can build that information into a database, " Catlett said.

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