Concept stub

Hard Disk Drive

Hardware

Spinning magnetic storage, from IBM's 1956 RAMAC onward.

Hard Disk Drive — Spinning magnetic storage, from IBM's 1956 RAMAC onward.

This entry is a stub. It will be written out in full when a Chromix article calls for it. What belongs here: what Hard Disk Drive actually did, why it mattered at the time, and what it made possible afterwards — each claim carrying its own source.

This entry is a stub. Most First Principles entries begin short and deepen only when a new article calls for it — the encyclopedia grows as Chromix writes.