IEEE Computer magazine seeks articles for a special issue on Internet data centers, to appear in November 2004. Guest editors are Krishna Kant from Intel and Prasant Mohapatra from the University of California, Davis. Internet data centers (IDC) form the backbone of most Internet based services, including e-commerce, IP-based telecom services, hosting services, and the like. As the reach of the Internet widens and more business-critical services are offered, the demands on IDCs grow along multiple dimensions, including responsiveness, service differentiation, security, and availability. Many other forces are likely to affect how the data centers of the future are designed, provisioned, and operated. IEEE Computer's special issue will focus on research issues in identifying and implementing new strategies for optimizing IDCs: application services, protocol enhancements, performance evaluations, provisions for adequate security, protection and isolation, and ensuring an adequate quality of service. IEEE Computer is soliciting a small number of high-quality papers from academia and industry that highlight various problems and solutions and provide a vision for future work in this area. Topics of particular interest include system architecture and converged data centers; symmetric multiprocessors versus clustered systems; scalability, reliability, and fault tolerance; performance evaluation and workload characterization; operations, control, and autonomic management; power management issues; exploitation of new hardware/software technologies; and issues of security, protection, and isolation. The deadline for papers is 1 April 2004. Submission guidelines are available at www.computer.org/computer/author.htm. Submit manuscripts at http://cs-ieee.manuscriptcentral.com/. Send inquiries to the guest editors at krishna.kant@intel.com and prasant@cs.ucdavis.edu.