Processes are introduced to enable multiple processes to execute concurrently, while improving resource utilization and system throughput
1.the process is dynamic, while the program is static.
2. the process has a certain lifetime, and the program is a set of instructions, itself has no "movement" meaning. A program that does not create a process cannot be recognized by the operating system as a separate unit.
3. A program can correspond to multiple processes, but a process can only corresp