16 Cyg A is the upper right of the two bright stars in the center of the image. 16 Cyg B is the bright star lower and to the left of A. The A component has a spectral type of G1.5Vb while the B component is a G3V type. These are similar to the sun, which is a G2V type.
The third star, 16 Cyg C is not visible in this image. It is a red dwarf and it closely orbits the A component. The C star is too small and the orbit too tight to show up in optical images at this scale.
In 1996 the B component was discovered to have an exoplanet. This planet is known as 16 Cyg B b and it has an orbital period of 799.5 days.
Since both the A and B components are very close in color to our sun, they are almost perfectly white balanced and can be used to calibrate color images taken of deep space objects. For example, the images currently being taken for this website are normally calibrated against an average color sample taken from these two stars.