Quite some websites are providing interesting insights about Purchasing. Here is a selection I found key for Purchasing professionals.
Center for Strategic Supply Research is a non-profit, independent research organization co-sponsored by the W. P. Carey School of Business at Arizona State University and the Institute for Supply Management. CAPS contributes competitive advantage to organizations by delivering leading-edge research globally to support continuous change and breakthrough performance improvement in strategic sourcing and supply.
Institute for Supply Management
Founded in 1915, the Institute for Supply Management? (ISM) is the largest supply management association in the world as well as one of the most respected. ISM?s mission is to lead the supply management profession through its standards of excellence, research, promotional activities, and education.
Supply Management.com
Supply Management (SM) is the online magazine for purchasing, procurement,and supply chain professionals. Covering supply management, procurement, purchasing, e-commerce, logistics etc.
Purchasing.com
Purchasing Magazine provides purchasing and supply chain management professionals with how-to-buy information to perform their jobs, including forecasts, proprietary data, strategic sourcing ideas, and interpretive articles written by an experienced staff of editors. Scope is global, but primary focus is on the U.S. and Canada.
CIPS
CIPS is an international organisation, based in the UK, serving the purchasing and supply profession.
PSL
Partnership Sourcing Ltd. (PSL) encourages the building of relationships between organisations in order to add value, deliver benefit and thereby enhance competitiveness.