Thread is a light weight process runs with in an application or a process to perform or execute desired set of instructions. A process can contain N number of threads to perform a unique operation , this unique operation will be divided into sub operations and assigned to threads to complete.
Process may or not may not communicate with other process but in case of threads needs communication with other threads for best practice but there is no compulsion as such.
|1||Light weight Process||May or may not be a light weight process|
|2||Performs sub operations with in a process||Performs a Unique operation|
|3||Needs to communicate with other threads for its existence||May or may note require to communicate with other process|