The Bass Clef
This clef is used for the cello, euphonium, double bass, bass guitar, bassoon, contrabassoon, trombone, baritone, tuba, and timpani. It is also used for the lowest notes of the horn, and for the baritone and bass voices. Tenor voice is notated in bass clef when the tenor and bass are written on the same staff.

Bass clef is the bottom clef in the grand staff for harp and keyboard instruments.
middle C
Letter names below with phrases that may help with remembering them.
Good Boys Deserve Fun Always
All Cows Eat Grass
This is the order of the seven sharps written in the bass clef.
This is the order of the seven flats written in the bass clef.