Operating Systems Multiprogramming Program A Run Walt Run Walt Program B Walt Run Walt Run Walt Program c wa缪 Walt Walt RunRun Run Run Rut Combined Walt Walt A B B TIme Multiprogramming with three programs Gao Haichang, Software School, Xidian University 14Operating Systems Gao Haichang , Software School, Xidian University 14 Multiprogramming Multiprogramming with three programs