Difference between a thread and process

Below are some differences:

Process
a. A process is like an individual executing program having its own memory space & system resources.
b. Process has its own seperate memory space.
c. A process can contain a number of threads.

Thread
a. Thread are like an OS environment features which run in the context of a process. Threads are way to split different tasks of a program to improve performance.
b. Threads share resources of the process in which they resides.
c. Threads are contained within the process. Reverse is never possible.