History and Terminology
The PATA standard was originally conceived as the "PC/AT Attachment" because its primary feature was a direct connection to the 16-bit ISA bus introduced with the IBM PC/AT. The "AT" in "IBM PC/AT" refers to "Advanced Technology," but the ATA specifications simply use the name "AT Attachment", to avoid possible trademark issues with IBM.
Read more about this topic: Parallel ATA
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“Let us not underrate the value of a fact; it will one day flower in a truth. It is astonishing how few facts of importance are added in a century to the natural history of any animal. The natural history of man himself is still being gradually written.”
—Henry David Thoreau (1817–1862)