Fig. 1: The Major Scale
The major scale contains 7 notes and is the basic building block of all western music. The tab below shows the major scale beginning on C (3rd fret of the A string). Beginning with C makes the scale the C major scale which notes are as follows: C, D, E, F, G, A, B. Then it can start all over again beginning with the next C (called an octave- which is the 1st fret on the B string in the tab below).
Fig. 2: Extended Major Scale
The 7 notes of the major scale repeat over and over. This tab shows all the notes from the major scale when playing in the open C position.
Fig. 3: Pentatonic Major
The major pentatonic scale may be thought of as a an incomplete major scale. Pentatonic scales lack the most dissonant intervals- it omits the 4th and 7th scale steps. It has a unique character and is widely used because of ease, but things start falling apart when we start talking about theory or chord variations.
This table will help you learn the scale steps for C major.