abstract:A Unix-like (sometimes referred to as UN*X or *nix) operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification.
That software "glue" means that IBM can use its dominance in the mainframe arena to win x86 and Unix customers away from competitors like Hewlett-Packard, which recently declared that it sells more x86 servers than any other vendor, and Dell.