But IBM’s computers were almost exclusively large room-filling behemoths owned by giant corporations. That changed in 1981 when IBM introduced the IBM Model 5150, better known as the IBM PC.

The IBM Personal Computer was late to the market, arriving in 1981, but is still considered one of the most influential computers in history. But upstarts were beginning to nip at IBM's heels.

On this day, August 12 in 1981, the biggest shake-up in the history of computing took place at the Waldorf Astoria Hotel in New York City: The IBM Personal Computer model 5150 was released.

If any other company of the era built and marketed the IBM Personal Computer Model 5150, it might be looked back on with fondness but not as a product that changed an industry.

And to do so, the company has released a video lecture of its history that contains at least one very contestable assertion—that IBM gets credit for the personal computer.

It's difficult to imagine life today without computers, but the personal computer was barely a reality just 33 years ago. On August 12th, 1981, IBM introduced their first PC model, also known as ...

As ubiquitous as they might be now, in the 1970s, few things were more mysterious and unknown than the “personal computer.” For years, these shadowy, ever-shrinking machines had been touted as ...

On this day in 1981, IBM IBM launched its IBM Personal Computer. Where The Market Was : The Dow Jones Industrial Average closed at 945.21 and the S&P 500 traded at 133.40. What Else Was Going On ...