From the computer priesthood to the desktop revolution
In short: Before the 1970s, computers were not tools for people; they were massive, intimidating machines tended by a specialized class of technicians. The transition from room-sized mainframes to personal devices wasn't just a technical shift—it was a fundamental democratization of power that moved computing from the laboratory to the living room.
Before 1970, the computing landscape was dominated by room-sized mainframes and smaller, yet still expensive, minicomputers. These machines required thousands of individual transistors and were so complex that they were managed by a 'computer priesthood'—specialized technicians who operated the hardware while the general public viewed them as impersonal, job-threatening 'giant brains.' Interaction was a laborious, multi-step relay: programmers wrote code on paper, keypunch operators converted it to punch cards, and operators fed those cards into readers.
The shift began in the early 1970s as integrated circuit technology matured, making the building blocks for desktop computing viable. A pivotal moment arrived in 1975 with the Altair 8800, which proved that individual use was possible. This paved the way for the '1977 Trinity'—a trio of consumer-oriented machines including the Apple II, the Tandy TRS-80, and the Commodore PET 2001—which brought computing to the masses.
However, the industry's trajectory was solidified in 1981 by the IBM PC. By adopting an open architecture, IBM allowed for 'IBM compatible' systems that consolidated the market, a move that stood in stark contrast to Apple's choice of a closed architecture. This divergence created the foundational 'Mac vs. PC' debate. By 1984, as Apple faced a rapid loss in market share, the company began searching for a radical new user experience to reclaim its position in a rapidly evolving landscape.
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Sources
- Summary by Intellect · source: The Personal Computer Revolution: Crash Course Computer Science #25
- Also: Computer - Home Use, Microprocessors, Software | Britannica
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