This document discusses why cloud computing needs to adopt free and open source software (FOSS) principles. It provides a brief history of computing beginning with mainframes and virtualization in the 1960s. It discusses how software was initially free but later became proprietary. The document advocates for open standards and highlights OpenStack as an example of an open source cloud computing platform developed through collaboration. It argues that users care most about features and interoperability rather than underlying technologies, and that open source helps prevent vendor lock-in while fostering innovation. The overall message is that cloud computing should embrace open source and open standards to provide users with freedom.