10. HEÄ THOÁNG ÑA CHÖÔNG PHAÂN ÑOAÏN THAY ÑOÅI (Variable Partitioning Multiprogramming) OS User A 15KB User B 25KB User C 40KB P0 P2 P1
11.
12. HEÄ THOÁNG ÑA CHÖÔNG COÙ THAY THEÁ VUØNG NHÔÙ (Multiprogramming With Storage Swapping) OS SWAPPING AREA Programs on Secondary storage swap in swap out