Search results
Results From The WOW.Com Content Network
PSA was launched in July 1991 by David Hall, owner of the coin grading company Professional Coin Grading Service (PCGS), to serve collectors as a third-party card grader. [1] At the outset, the business faced difficulties owing to a limited demand from collectors who sought card grading services. [2]
Collectors Universe Inc. is an American company formed in 1986, now based in Santa Ana, California, which provides third-party authentication and grading services to collectors, retail buyers and sellers of collectibles. Its authentication services focus on coins, trading cards, sports memorabilia, and autographs.
Numismatic Guaranty Company (NGC) is an international third-party coin grading and certification service based in Sarasota, Florida. It has certified more than 60 million coins. NGC certification consists of authentication, grading, attribution, and encapsulation in clear plastic holders.
For premium support please call: 800-290-4726 more ways to reach us
Alan "Mr. Mint" Rosen (c. 1943 – January 24, 2013) was an American sports collectibles dealer who was especially active in the 1980s and 1990s. [1] He advertised heavily and was a fixture at card conventions.
PSA software is designed to improve the performance and profitability of professional services firms. A recent end-user survey conducted by SPI Research [4] showed significant improvement in key performance indicators such as: Faster staffing and invoicing workflows; Lower project cancellation rates; Improved on-time, under-budget project ...
The pneumonia severity index (PSI) or PORT Score is a clinical prediction rule that medical practitioners can use to calculate the probability of morbidity and mortality among patients with community acquired pneumonia.
The Photographic Society of America (PSA) is one of the largest, non-profit organizations of its kind. [1] Established in 1934, it has expanded to include members of over 60 countries. The mission of this association is to promote and enhance the art and science of photography in all its phases, among members and non-members alike.