Network devices

Quick question for any networking experts out there: if you have a PC connected to a hub, and it sends out a packet of data, does that go to every machine connected to that hub, or every other machine? I.e. does the originating machine get a copy? The documentation I've read seems to be a bit inconsistent on this point.

Thus a poll:

Poll #584593 Hubs

Open to: All, detailed results viewable to: All. Participants: 5