What does "A. P. M. S" of Nikon camera mean?

These are all exposure modes, which can also be understood as shooting mode A, that is, aperture priority, manual control of aperture shutter speed and automatic control of camera, which is also the most commonly used mode for friends who use SLR.

P is program exposure, which means automatic exposure. There are many modes to choose from, such as night sports. When it encounters a scene, choose this mode, and the camera will automatically expose you according to the scene.

M is a manual exposure aperture shutter is set by yourself.

S is shutter priority, that is, you set the shutter speed yourself, and the aperture is controlled by the camera. This s block is opposite to a block.