Process Interaction

  
Figure 2:

• Processes are concurrent (exist at the same time) - need to cooperate and synchronise activities with each other
• Share resources (such as CPU and I/O) and results with each other - How ?

Shared resources could be :
Data : Program counter, variables or queues
Devices : Printers, tapes, terminals

U

Race Conditions (in printing and memory)

Multiple process writing or modifying simultaneously