GPS
n. C / Un. Stands for Global Positioning System. A system that uses satellites to show you exactly where you are on a map. You use it to get directions when you are driving or walking.
n. Abbreviation for Global Positioning System. A satellite-based navigation system providing location and time information to a receiver anywhere on Earth with a clear sky view. Frequently used as a modifier ('GPS device', 'GPS coordinates').
I use the GPS on my phone to find the restaurant.
The driver missed the turn because the GPS signal was weak between the tall buildings.
Modern logistics companies rely on GPS to monitor their fleets in real time, ensuring that delivery schedules are met and fuel consumption is minimized through optimized routing.
Uncountable when referring to the global system; countable when referring to a specific physical receiver or device.
I bought a new GPS systemI bought a new GPSThe 'S' in GPS already stands for 'System', so adding the word 'system' after the acronym is redundant.