What we call multitasking is usually task switching, according to an article I read after a similar discussion on HN. The dividing line has something to do with

What we call multitasking is usually task switching, according to an article I read after a similar discussion on HN. The dividing line has something to do with only one task at a time being able to use an area of the brain. As long as one of the tasks doesn't use that area, you can multitask. Otherwise, you can physically only task switch.