Difference between Program and Process

1. Program: When we execute a program that was just compiled, the OS will generate a process to execute the program. Execution of the program starts via GUI mouse clicks, command line entry of its name, etc. A program is a passive entity as it resides in the secondary memory, such as the contents of a file stored on disk. One program can have several processes. 

2. Process: The term process (Job) refers to program code that has been loaded into a computer’s memory so that it can be executed by the central processing unit (CPU). A process can be described as an instance of a program running on a computer or as an entity that can be assigned to and executed on a processor. A program becomes a process when loaded into memory and thus is an active entity. 

The difference between Program and Process:

Program	Process
Program contains a set of instructions designed to complete a specific task.	Process is an instance of an executing program.
Program is a passive entity as it resides in the secondary memory.	Process is a active entity as it is created during execution and loaded into the main memory.
Program exists at a single place and continues to exist until it is deleted.	Process exists for a limited span of time as it gets terminated after the completion of task.
Program is a static entity.	Process is a dynamic entity.
Program does not have any resource requirement, it only requires memory space for storing the instructions.	Process has a high resource requirement, it needs resources like CPU, memory address, I/O during its lifetime.
Program does not have any control block.	Process has its own control block called Process Control Block.
Program has two logical components: code and data.	In addition to program data, a process also requires additional information required for the management and execution.
Program does not change itself.	Many processes may execute a single program. There program code may be the same but program data may be different. these are never same.
Program contains instructions	Process is a sequence of instruction execution.