CST

• Central Standard Time, North America: UTC−06:00
• China Standard Time: UTC+08:00
• Cuba Standard Time: UTC−04:00

• Canada Social Transfer, an equalization payment
• Collective Security Treaty of the Commonwealth of Independent States
• Sandinista Workers' Centre ({{langx|es|Central Sandinista de Trabajadores|link=no}}), in Nicaragua
• Socialist Workers' Current ({{langx|pt|Corrente Socialista dos Trabalhadores|link=no}}), in Brazil

• Canadian Society of Transplantation
• Captopril suppression test
• Cavernous sinus thrombosis
• Cell Signaling Technology, a US company
• Certified Sex Therapist
• Certified surgical technologist
• Contraction stress test in obstetrics
• Council for Science and Technology of the UK government
• Craniosacral therapy
• Cystatin (CST)
• CST complex, a protein trimer

• Cambridge Systems Technology, Former UK computing company
• Centistokes (cSt), a unit of kinematic viscosity
• Certification for Sustainable Transportation, University of Vermont, US
• Concept of Stratification
• Concrete syntax tree
• Common Spanning Tree, a networking technology
• Computer Simulation Technology, a maker of computational electromagnetics software
• Constant strain triangle element, in finite element analysis
• Cross-species transmission
• Concentrated Solar Thermal, another name for Concentrated solar power

• Cargo Sous Terrain, a planned underground logistics system in Switzerland
• Stockholm Central Station (station code Cst)
• Chhatrapati Shivaji Terminus, Mumbai, India
• Coast Air of Norway (ICAO designator CST)
• Cannon Street station, London, England

• California Standards Test
• Catholic social teaching
• Center for Survivors of Torture, an American charity
• Cheng Shin Tire, Taiwan
• Chicago Shakespeare Theater
• Child sex tourism
• Church of Spiritual Technology, Scientology company
• Civil Support Team, US
• Claremont School of Theology, California, US
• Community Security Trust, a UK Jewish charity
• Compliance, Strategy, and Transactions, the framework within business operations related to regulations (compliance), long-term organizational plans (strategy), and financial deals and operational activities (transactions).
• Cox Sports Television
• Czechoslovak Television, ČST
• Congregation of Saint Thérèse of Lisieux

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• Crew Space Transportation 100 (CST-100)
• {{srt}}

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