IBM had released personal computers previously and by 1987 they had released their third generation of personal computers, called PS/2 abbreviated for Personal System/2. The purpose of IBM creating this system was because by this time they had competition in the computer industry therefore they wanted to get back on top of their game to make sure that they were the top sellers in this industry. Even though the costs were high and some preferred to stick to their old models, IBM still succeeded.
On September 30th 1988, IBM shipped its 3 millionths PS/2 personal computer. This occurred nearly 18 months after the PS/2 was released to the public.
IBM sold a good amount of PS/2, but their marketing was criticized for being on the low end. One can only imagine how much more money it would have brought in if the marketing was not so poorly managed.