★ Process hierarchies ￥ 斗 ★★ o Parent creates a child process o Child processes can create its own process o Processes creation foms a hierarchy UNdX callsthis a"processgroup Windowshasno concept of such hierarchy, i.e. all processesare createdequal9 Process Hierarchies  Parent creates a child process  Child processes can create its own process  Processes creation forms a hierarchy – UNIX calls this a "process group" – Windows has no concept of such hierarchy, i.e. all processes are created equal