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Main Processor
Memory Registers
Process index i

Process Process i PC

Base
list Limit b h
j
Management registers
Other

Context

Process Data
 The entire state of the A

process at any instant is Program
(code)
contained in its context
b
 New features can be Context

designed and incorporated Process h Data
B
into the OS by expanding Program
(code)
the context to include any

new information needed to

support the feature

Figure 2.8 Typical Process Implementation