Book excerpt: The Year 2000 (Y2K) challenge was a major test of the nation's ability to protect our computer systems and the critical operations and infrastructures they support. The government successful met the Y2K challenge. However, major mgmt. challenges remain in areas such as computer security and critical infrastructure protection. This report (1) identifies lessons the federal government has learned from Y2K applicable to improving federal information technology (IT) mgmt., (2) identifies lessons that individual agencies can apply to mgmt. of future IT initiatives, and (3) discusses how the momentum generated by the government's Y2K efforts can be sustained.