IBM is a computer hardware and software vendor operating in a variety of market spaces, including Unix systems, "midrange" (AS/400) systems, Mainframes, and consumer workstations/laptops. This is a generic tag designed to be used if no more specific tag exists for your IBM product. See the partial list of IBM tags in the full tag wiki
The IBM tag should only be used if no more specific tag exists for your IBM product. Some tags you might consider instead include: