sport
It stands for SPORT MODE. The engine rpms go higher before it shifts gears, giving you more of a high performance type of feel. You get more power but you also get less fuel economy with this setting. You can probably get a better description from the owner's manual.
D stands for Drive.
Plus-minus
Drive. If it has a circle around it, it has automatic overdrive.
Automatic Temperature Control.
no
Electronic automatic transaxle.
Automatic Transmission.
Automatic transmission
The minus sign.
It is located on the bottom of the generator stand.