Watch the Tablature (Tab) online guitar lesson by TrueFire from The Indispensable Toolbox for Guitarists

Tablature (Tab) - is a video guitar lesson presented by Rich Maloof and is sourced from Acoustic Guitar For Beginners.

Some of the ways written music can be represented:
CHORDS AND LYRICS - Clean and simple, but without measures or other traditional elements of sheet music.
STANDARD MUSIC NOTATION - Classic system showing pitches and rhythms on a staff. This is the best and most accurate way to represent music on a page, but you don't have to learn music notation to be able to strum the guitar.
TABLATURE (TAB)- A graphic system for representing notes on the neck of a guitar. Digits on lines show which frets to use on each string. Tab does not show rhythms.
GUITAR/PIANO PARTS - For most strumming, you can ignore the piano parts (shown in standard notation) and just look for the chord names and/or chord blocks shown above the staff for guitar players.
FULL ARRANGEMENTS - Don't trouble yourself with parts written out for other instruments, such as bass, saxophone or drums. Just look for the chords shown for guitarists.