hard disk

noun Computers.

magnetic disk (def. 1).

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Origin:
1980–85

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Hard_disk is always a great word to know.

So is gigabyte. Does it mean:

storage, as on disk or tape, supplemental to and slower than main storage, not under the direct control of the CPU and generally contained outside it

a measure of storage capacity equal to 1 billion (109) bytes

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Collins

World English Dictionary

hard disk

—n
	a disk of rigid magnetizable material that is used to store data for computers: it is permanently mounted in its disk drive and usually has a storage capacity of a few gigabytes

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Science Dictionary

hard disk

(härd) Pronunciation Key
A rigid magnetic disk fixed within a disk drive and used for storing computer data. Hard disks hold more data than floppy disks, and data on a hard disk can be accessed faster than data on a floppy disk.

FOLDOC

Computing Dictionary

hard disk definition

storage
(In contrast to floppy disk) A magnetic disk data storage device where the disks are rigid and fixed to a central axle. They are usually packaged with associated read/write heads and electronics. Most hard disks are permanently connected to the drive (fixed disks) though there are also removable hard disks.
See magnetic disk.
(2007-06-14)

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Matching Quote

"The child receives data through the sense organs; the child also has some inborn processing capacities—otherwise it would not be able to learn—but in addition, some "information" or "programs" are built-in at birth (for example, the child does not have to learn how to suck, for this is an innate reflex); there is a working memory, in which the child keeps those items of knowledge that are being used at a particular moment; and there is a permanent memory, which is, in Locke's terms, largely a "blank tablet" at birth, but which has a storage capacity that makes a hard disk pale into insignificance. The child gradually builds up a symbolic representation of the world around it, so there must be some inner "language" or medium of representation; even a newborn baby is starting to see and taste and smell and hear and touch, and to remember the more striking of its experiences, so the internal medium by which it represents and stores these impressions cannot be the native language (of which it is still ignorant. Jerry Fodor [in The Language of Thought] has discussed this inbuilt "language of thought," which is similar conceptually to the "machine language" that is built into the personal computer and about which most users remain completely ignorant)."

-John Cleverley