1. Society for Creative Anachronism - an international organization dedicated to researching and re-creating the arts and skills of pre-17th-century Europe.
2. Sudden Cardiac Arrest - a medical emergency in which the heart suddenly stops beating, leading to loss of consciousness and death if not treated immediately.
3. Securities and Exchange Commission - a government agency responsible for regulating the securities industry in the United States.
4. Spontaneous Coronary Artery Dissection - a rare condition in which a tear occurs in one of the coronary arteries, leading to a heart attack.
5. Student Conservation Association - a non-profit organization that provides opportunities for young people to participate in conservation projects across the United States.