The American Association for Respiratory Care (AARC) will continue to be the leading national and international professional association for respiratory care. The AARC will encourage and promote professional excellence, advance the science and practice of respiratory care, and serve as an advocate for patients, their families, the public, the profession and the respiratory therapist.
TWA redirects here. For other uses, see TWA (disambiguation). Trans World Airlines (TWA) was a major American airline from 1924 until 2001. It was formed as Transcontinental & Western Air to operate a route from New York City to Los Angeles via St. Louis, Kansas City, and other stops, with Ford Trimotors.
The abbreviations âCTWâ, âCWTâ, âTWâ and âTDWâ all mean the same thing. Carat total weight or total diamond weight represents the weight summation of all the diamonds on that piece of jewelry. When you come across jewelry using CTW in their description, be sure that you check the sizes of diamonds used. I will explain why in a moment. In the trade, the reason behind using total weight nomenclature is for convenience and to make a piece of jewelry sound impressive. Now, letâs do a quick test.