It isn't widely known (even by guitarists) but the guitar is actually a transposing instrument! It's still written in the key of C but every note is written one octave higher than it sounds; since there is no bass clef being used this helps keep everything as close to the middle of the treble clef as possible.
This is especially important to keep in mind when writing unison lines or arranging between the guitar, bass guitar and piano/keys.
The electric guitar is the most common type of guitar in a jazz big band along with most other contemporary, rock and funk ensembles. Although there are many different designs and types of the instrument all electric guitars have similar ranges, articulations and effects.
The acoustic guitar is not a common instrument in most jazz, rock or funk ensembles but you will occasionally see it either as a rhythm instrument on its own or supporting an electric lead guitar. The essentials of the instrument are the same as the electric but the range and certain effects are slightly limited (See the range and effects sections for more information).
A rare version of the guitar for most groups but becoming more common in rock and heavy music. The baritone guitar has a longer scale (neck length) and much thicker strings than a standard acoustic or electric guitar and can therefore be tuned lower without sacrificing string tension or note intonation.