What does ESN stand for?

What does ESN mean?

ESN	Entellect Solutions Ltd Business » ASX Symbols
ESN	Electronic Serial Number Academic & Science » Electronics
ESN	European Services Network Business » Firms
ESN	Electronic Serial Number Business » General
ESN	Electronic Solutions Now Business » General
ESN	Eldor Spinal Needle Medical » Hospitals
ESN	Enterprise Storage Network Computing » Networking
ESN	European Singularity Network Computing » Networking
ESN	Essential Energy Services Ltd. Business » Toronto Stock Exchange
ESN	Everything Something Nothing Miscellaneous » Unclassified
ESN	Emergency Service Number Miscellaneous » Unclassified
ESN	European Shoutcast Network Miscellaneous » Unclassified
ESN	Elite Soldiers Of Nato Miscellaneous » Unclassified
ESN	E Sports Netherlands Miscellaneous » Unclassified
ESN	European Student Network Miscellaneous » Unclassified
ESN	Erasmus Student Network Academic & Science » Universities