What is a pipboy 3000

The device worn by vault dwellers in the popular 'Fallout' series by Bethesda. They were first introduced in Fallout 3. They are portable, wrist worn, computers containing your vitals and health status, everything you're currently holding, as well as a built in GPS. They are especially useful for an escaped vault dweller as they would be completely oblivious to the land they would step out on!