Demonstration Photos of Instruments with Labels Attached on the Fretboards in Keyboard Style Patterns

The instruments illustrated below have their stings tuned to either all G, E, C, F or B notes, but any of the 12 whole or half notes A, A#, B, C, C#, D, D#, E, F, F#, G, or G# may be used. For these examples the keyboard pattern may start with an optional white stripe at the headstock base, referred to as fret 0, just before the nut at the far end of the fretboard, to indicate the notes of the open strings. The closer the frets are to the headstock the lower pitch will be when pressing on that fret and strumming the strings, and the closer the frets are to the instrument body the higher the pitch will be. 

From the player's perspective, looking down at the fretboard on the neck of the instrument in front of him, the order of the notes perfectly corresponds to the perspective one has when looking down at a piano keyboard, with the lower notes to the left and the higher notes to the right.  Pressing down or sliding a finger on the frets while strumming is then essentially the same as playing a tune on a keyboard, and whatever one can tap out or play one finger at a time on a keyboard is easily replicated on the guitar. There is no need to learn complex fingering patterns, although advanced players will certainly be able to use their skills for improved performances.
It doesn't matter what specific instrument it may be, a regular 6 string acoustic or electric guitar, a 4 string bass guitar, a 4 string ukulele, an 8 string mandolin, or whatever, there is no need to learn any of the normally different fingering patterns, since all such instruments may be played immediately and easily with this very same intuitive keyboard style method. 

Each instrument below is shown first from a Front/Audience view and then from a Top/Player's view:Â