This document discusses the introduction of Planning, Programming, Budgeting Systems (PPBS) across the US government in the 1960s. PPBS originated in the Department of Defense in 1961 to bring more rational decision making to defense expenditures. It broke down spending into programs aligned with objectives. The success of PPBS in Defense led to its adoption government-wide by President Johnson in 1965. PPBS requires defining objectives, analyzing alternatives, and long-term planning to allocate resources through the federal budget in a more systematic, evidence-based manner. While controversial, PPBS aimed to improve priority setting and resource allocation across the entire government.