Bluetooth is the most reasonable answer
/etc/services on my CentOS machine goes up to 49000. Reserved ports are less than 1024.
Well known and reserved ports are two different things. Well known ports only need a registration with IANA. Reserved ports, on *nixes, requires root for a deamon to bind to the port.
If it is on the desktop screen you just right click on the icon and select delete. from there if you're on a windows computer it goes to your recycle bin then you right click the recycle bin and a little rectangle pops up an in that rectangle it says clear recycle bin and once you press that all of the stuff that was in there is deleted. now if your on a computer that has chrome os installed you just go to the files screen and right click what you want to delete and click delete and it's gone.