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bubble memory

noun Computers.
  1. a storage medium employing tiny, movable, bubble-shaped magnetized areas within a magnetic material to represent data bits.
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Origin of bubble memory

First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for bubble memory

bubble memory

noun
  1. computing a method of storing high volumes of data by the use of minute pockets of magnetism (bubbles) in a semiconducting material: the bubbles may be caused to migrate past a read head or to a buffer area for storage
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012