Contiguous Allocation
The Bare Memory without an OS
Programs contain the code for
device drivers
Compile time binding of addresses
OS + BIOS + Memory
IBM PCs
Overlays
Overlay drivers
user level management
Multiple Fixed Partitioning
Allocation: Single Queue Vs.
Multiple Queues
The OS/360 scheme
Multiple Variable Partitioning
Allocation: first fit, best fit, worst fit
External and Internal Fragmentation