Difference between task and process
The difference appears to be that "process" is a well-defined term with a specific meaning that is universally understood, whereas "task" is ambiguous and means different things to different people.

The following Stack Overflow questions on the same topic support this:


https://stackoverflow.com/questions/3042717/what-is-the-difference-between-a-thread-process-task
https://stackoverflow.com/questions/2560939/task-vs-process-is-there-really-any-difference


Microsoft Windows certainly conflates the two terms—the Task Manager is used to administer processes.