Numismatist noted numismatist who was not an avid collector, and King Farouk I of Egypt was an avid collector who had very little interest in numismatics. Harry Bass by comparison was a noted collector who was also a numismatist. The second group are the coin dealers. Often called professional numismatists, they authenticate or grade coins for commercial purposes. The buying and selling of coin collections by numismatists who are professional dealers advances the study of money, and expert numismatists are consulted by historians, museum curators, and archaeologists. See, for example, the International Association of Professional Numismatists (IAPN) and the British Numismatic
Collect call calls, the most collect calls are made on Father's Day. Other forms of paid communication, such as telegrams and mail, could also be sent as "collect". Mobile collect call solutions allow prepaid and postpaid end-users to easily make mobile collect calls on their home network or while roaming, even when they have run out of credit. The caller can request either complete or partial reversed charging. Several companies provide reverse call services in Australia, including 1800MUMDAD 1800686323, 1800Reverse and 1800PhoneHome. 12550 is an alternative Reverse charge call service available from Telstra Pay Telephones and Telstra Prepaid mobiles. However, in the