This document discusses several cybersecurity standards and frameworks. It describes the objectives of cybersecurity standards as protecting users, networks, devices, software, processes, information, applications, services and systems from cyber attacks by implementing tools, policies, security concepts, guidelines and best practices. It provides an overview of the NIST Cybersecurity Framework, ISO/IEC 27001, PCI DSS, HIPAA, SOX, and GDPR frameworks. It also discusses how security controls can be classified based on when they act, their nature, and provides examples of controls from the ISO/IEC 27001 and US NIST Special Publication standards.