LS pushbutton on A320

[speedbird787]

Dear fellow aviators, would like to know the full form of LS pushbutton on a320 . searched the fcom , fctm , AFM, ....no joy:ugh:

Is it LANDING SYSTEM
LOCALIZER SCALE ......what ??? Just a guess though

[Cough]

Landing system. I believe it changed from ILS when MLS/GLS etc became options...