QSD
# QSD

QSD may refer to:

* Q_code, "Is my keying defective?" / "Are my signals mutilated?"
* Quality spread differential, a concept in finance
* Quadrilateral Security Dialogue, a strategic dialogue
* Quick Step–Davitamon, UCI cycling team (2003–04)
* Syrian Democratic Forces (Quwwāt Sūriyā al-Dīmuqrāṭīya)
