Memory usage by modern computer operating systems spans these levels with virtual memory, a system that provides programs with large address spaces (addressable memory), which may exceed the actual RAM in the computer.
The GSMA puts the global "addressable" population at just 4.7 billion (1.5 billion more than the current 3.2 billion unique subscribers).
The world's addressable population ought to swell by 300m over the next five years.
"The convergence of social and mobile has given an addressable audience online that's 100 times bigger than ever before," says Jonah Peretti, the founder of BuzzFeed, an online news and entertainment site.
The newest thing offered by cable and satellite TV companies is called "addressable advertising".
According to calculations by CLSA, a French-Asian investment bank, Indian IT firms will soon have a share of nearly 20% of their addressable market's value and almost 40% of its volume.
By moving downstream, SAP hopes to expand its customer-base from 35,000 companies today to 100,000 by 2010, and double its addressable market to $70 billion.
The company, which hopes to market the technology in partnership with display makers, expects to be shipping products by 2004.Meanwhile, E-Ink, based in Cambridge, Massachusetts, is attempting to create flexible, paper-like displays using inks that are electronically addressable.
In January, Dish Network and DirecTV, two satellite firms, announced that they can reach some 20m households with directly addressable advertising.
