1 Decoherence-free subspaces, subspace of a system's Hilbert space where the system is decoupled from the environment.  Dynamic Frequency Selection, part of the IEEE 802.11h wireless standard.
The American Psychological Association (APA) is a scientific and professional organization that represents psychologists in the United States.
The American Association of Surgical Physician Assistants. AASPA is the leading support organization representing all PAs who manage surgical patients. AASPA helps to support PAs who seek to better their careers, their professions and the quality of patient care. AASPAs ultimate goal is to improve patient care for surgical patients. We do this by addressing the needs of our membership, by marketing the profession, offering quality cost-effective hands-on CME, assisting with professional issues and providing a forum for networking and the exchange of ideas.