One who commutes (etymology 1).
To and from work and home.
Using public transport.
Normally a short form of commuter rail, commuter train or commuter bus; A transport system or a vehicle in such systems used to transport commuters (#2)
One who explores something
A person who by means of travel (notably an expedition) searches out new information.
A visual representation of a file system etc. through which the user can navigate.
Any of various hand tools, with sharp points, used in dentistry.