What are the different types of gear shifters available for vehicles?

There are three main types of gear shifters for vehicles: manual, automatic, and semi-automatic. Manual shifters require the driver to manually change gears using a clutch pedal and gear stick. Automatic shifters change gears automatically without the need for manual input. Semi-automatic shifters allow the driver to manually shift gears without a clutch pedal, using paddle shifters or buttons on the steering wheel.