The guitar is a string instuments. Mostly it has got 6 string. The standard tunig is: EADGBA
The guitar is a very popular instrument, because whit this it can play lots of music (pop, rock, classic etc.)
The classical guitar, also known as the "nylon string guitar". the classical guitar has evolved principally from three sources: the lute, the vihuela, and the Renaissance guitars.
The Spanish Guitar, or classical guitar developed in 19. century. The strings it made of nylon, but th ,,country", or steel guitar's strings it made of steel. For example Teremy's Ibanez guitar.