What is difference between wireless sensor network, GPS and GSM?

What is difference between wireless sensor network, GPS and GSM? Are those things is the same thing ?

https://en.m.wikipedia.org/wiki/Global_Positioning_Sys
GSM - Wikipedia

And wireles sensor network may some sort of sensor network that communicates wirelessly.

Or do you mean between GPRS and GSM ? https://en.m.wikipedia.org/wiki/General_Packet_Radio_Service