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In computer terms A20 refers to the first 64KB of extended memory (A0 to A19) of a PC known as the 'high memory area'.
Research A20
A20 is a cultivated variety of potato.
Research A20
 
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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