Operating Systems GA OS Features Needed for Multiprogramming 1O routine supplied by the system.(ⅣO例程) g Memory management- the system must allocate the memory to several jobs.(内存管理) g CPU scheduling-the system must choose among severaljobs ready to run(CPU调度) G Allocation of devices.(设备管理) Gao Haichang, Software School, Xidian University 17Operating Systems Gao Haichang , Software School, Xidian University 17 OS Features Needed for Multiprogramming  I/O routine supplied by the system. （I/O例程）  Memory management – the system must allocate the memory to several jobs.（内存管理）  CPU scheduling – the system must choose among several jobs ready to run.（CPU调度）  Allocation of devices.（设备管理）