 Atlas-I project. Credit-based flow control is discussed in the article "Reliable and Efficient Hop-by-Hop Flow Control" by C. Ozveren, R. Simcoe, and G. Varghese. The articles "Fast Switching and Fair Control of Congested Flow in Broad-Band Networks" by M. Katevenis and the article "Credit-Based Flow Control for ATM Networks" by H. T. Kung, T. Blackwell, and A. Chapman are also informative. Interesting information can also be found at the web site of the Quantum-Flow Control Alliance at www.qfc.org. Some interesting aspects of implementing WRR scheduling are discussed in the articles "Service Disciplines for Guaranteed Performance Service in Packet-Switching Networks" by Hui Zhang, "Implementing Scheduling Algorithms in High-Speed Networks" by D. Stephens, J. Bennett, and Hui Zhang, and "Pipelined Heap (Priority Queue) Management for Advanced Scheduling in High Speed Networks" by A. Ioannou and M. Katevenis. Issues regarding fast packet classification and route table lookup are covered nicely in the articles "IP Address Lookup in Hardware for High-Speed Routing" by Andreas Moestedt and Peter Sjodin, "Packet Classification on Multiple Fields" by P. Gupta and N. McKeown, "Fast Updating Algorithms for Ternary CAMs" by D. Shah and P. Gupta, and "High-Speed Policy-based Packet Forwarding Using Efficient Multi-Dimensional Range Matching" by T. Lakshman and D. Stiliadis. The March-April 2001 issue of IEEE Micro also contains several articles on the same subject. Finally, the articles "WDM Optical Communication Networks" by B. Mukherjee and "Advances in Photonic Packet Switching" by S. Yao, B. Mukherjee, and S. Dixit are good updated sources on optical switching applicable on the backbone of the wide area network (WAN). An excellent (usually biannual) report on the switch fabric industry is published by the Linley Group at www.linleygroup.com/npu/fabrics.html. Companies offering commercial off-the-shelf switch fabric chipsets include the following: Agere Systems (www.agere.com) AMCC (www.amcc.com) Dune Networks (www.dun