Dusty R wrote:
GFI = Ground Fault Interrupter Is what they were called when they first came out/were required.
GFCI = Ground Fault Current is what they are now called, there maybe a slight difference.
A GFCI receptacle is most often the first receptacle on a circuit then all the other receptacle down the line are also GFCI protected, if properly wired.
National Electrical Code (NEC) defines GFCI as "ground fault CIRCUIT interuptor.
Most electricians interchange the two GFI and GFCI as meaning the same thing.
There are GFCI receptacles and there are GFCI circuit breakers. They both work the same way.