Why do we call IBM compatible as duplicates IBM PCs?

The term "IBM-compatible" refers to personal computers that were designed to be compatible with the original IBM PC's hardware and software architecture. This compatibility allowed other manufacturers to produce clones that could run the same operating system and applications as IBM PCs, leading to a surge in the PC market. As a result, these clones often replicated the specifications and design of IBM's systems, hence the term "duplicates." This compatibility became a key factor in the widespread adoption of personal computers in the 1980s and 1990s.