A band booster is a person who helps promote and support a band or musical group. The term can be broken down into four parts: AMP (3 letters), TURBO (5 letters), ATLAS (5 letters), and AGENA (5 letters). AMP stands for Amplifier, which is an electronic device used to increase the volume of sound. TURBO is a type of engine that uses exhaust gases to increase power output. ATLAS is a type of rocket engine that provides thrust for spacecraft. Finally, AGENA is a type of rocket engine used to propel satellites into orbit. Together, these four terms form the term 'Band Booster, ' which describes someone who helps promote and support a band or musical group.