music: who sings beautiful stranger?

Questions

Investigation of physical, chemical, & biological conditions at the bottom of the ocean, for scientific & commercial purposes?

Irregular line drawn on the map of the pacific ocean, near, & in many places coincident with, the 180th meridian?

Is a benign tumour usually dangerous?

Is a coconut a fruit or a nut?

Is a computer itself called 'hardware' or 'software'?