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Process (Control block (Memory pointers (Program code, Data, Shared blocks…
Process
Control block
Identifier
State
Priority
Program counter
Memory pointers
Program code
Data
Shared blocks w/ other processes
Context data
i.e. register data
Accounting info
Processor & clock time used
Time limits
&c.
I/O status info
Outstanding I/O requests
Assigned I/O devices
Files in use by process
Creation
Reasons
New batch job
Interactive log-on
OS providing a service
Spawned by existing process
Process
Assign identifier
Allocate space
Init PCB
Set linkages
Create/expand other data structures
States
Image
Program status word