| Acronym | Definition |
|---|
| SEC➣Securities & Exchange Commission (US government) |
| SEC➣Second(s) |
| SEC➣Secretary |
| SEC➣Securities and Exchange Commission (authority in the Philippines) |
| SEC➣Section |
| SEC➣Space Environment Center (NOAA) |
| SEC➣Security |
| SEC➣Secondary |
| SEC➣Southeastern Conference |
| SEC➣Surveys of Enacted Curriculum |
| SEC➣Sun-Earth Connection (NASA) |
| SEC➣Software Engineering Center |
| SEC➣Size Exclusion Chromatography |
| SEC➣Specific Energy Consumption (energy efficiency) |
| SEC➣Seiko Epson Corporation (Japanese electronics company) |
| SEC➣Social and Economic Council (various locations) |
| SEC➣Software Engineering Conference (various locations) |
| SEC➣Secant (trigonometry) |
| SEC➣State Ethics Commission (various locations) |
| SEC➣Scottish Episcopal Church (UK) |
| SEC➣Saudi Electricity Company |
| SEC➣Special Education Committee |
| SEC➣Scientific and Engineering Computing |
| SEC➣Sharp Electronics Corporation (Mahwah, NJ) |
| SEC➣Standards and Ethics Committee (various organizations) |
| SEC➣Semiconductor Equipment Corporation (Moorpark, CA) |
| SEC➣Sydney Entertainment Centre (Sydney, Australia) |
| SEC➣Special Exposure Cohort |
| SEC➣Siemens Enterprise Communications (Siemens AG; Germany) |
| SEC➣South East Corner |
| SEC➣Secondary Containment |
| SEC➣Software Engineering Company |
| SEC➣Spiritual Enrichment Center (Bainbridge Island, WA) |
| SEC➣Student Employment Center (various schools) |
| SEC➣Socio-Economic Classification |
| SEC➣Spontaneous Echo Contrast (cardiology) |
| SEC➣Student Evaluation of Courses |
| SEC➣Student Executive Council (various schools) |
| SEC➣Socio-Economic Category |
| SEC➣Student Education Center (various schools) |
| SEC➣Shore Erosion Control |
| SEC➣Supreme Economic Council (Saudi Arabia) |
| SEC➣Southside Electric Cooperative (Virginia) |
| SEC➣Search Engine College (Australia) |
| SEC➣Suppress Error Correction |
| SEC➣Single Edge Contact |
| SEC➣Set Carry |
| SEC➣Sbus Ethernet Controller |
| SEC➣Singlebit Error Correction |
| SEC➣Security Evaluation Criteria |
| SEC➣Sequence End Code |
| SEC➣Securities and Exchange Commission |
| SEC➣Secured Animation File |
| SEC➣Scalable Enterprise Computing |
| SEC➣Shanghai Exhibition Center (China) |
| SEC➣Secaucus, New Jersey (New Jersey transit) |
| SEC➣Special Events Committee (various organizations) |
| SEC➣Standard Equipment Company (various companies) |
| SEC➣Singapore Environment Council |
| SEC➣Student Engineers' Council (various schools) |
| SEC➣Samsung Electronics Corporation |
| SEC➣Secretaría de Educación y Cultura (México) |
| SEC➣South Equatorial Current |
| SEC➣Single Edge Contact (Intel) |
| SEC➣Standard Entry Class |
| SEC➣Sustainable Energy Coalition (Takoma Park, MD) |
| SEC➣Set Carry (6502 processor instruction) |
| SEC➣Secretary's Department (International Monetary Fund) |
| SEC➣Sarkeys Energy Center (University of Oklahoma) |
| SEC➣Secure Electronic Commerce |
| SEC➣Student Executive Committee (various schools) |
| SEC➣Section Executive Committee |
| SEC➣Southeastern College (Pasay City, Philippines) |
| SEC➣Southeastern College |
| SEC➣Sports and Entertainment Commission (various locations) |
| SEC➣Single Error Correction |
| SEC➣Saudi Electric Company |
| SEC➣Sapporo Electronics and Industries Cultivation Foundation (Sapporo, Japan) |
| SEC➣Software Enabled Control |
| SEC➣Sonoma Ecology Center |
| SEC➣State Elections Commission (Puerto Rican government agency) |
| SEC➣Secondary Average (baseball statistic; determines how far on the bases a runner gets) |
| SEC➣Special Education Consultant |
| SEC➣Sociedad Española de Contracepción (Spanish: Spanish Society for Contraception) |
| SEC➣Spoken English Corpus |
| SEC➣Secans (trigonometry) |
| SEC➣Student Environment Centre (Canada) |
| SEC➣Summer English Camp |
| SEC➣State Engineering Corporation (Pakistan government) |
| SEC➣Staphylococcal Enterotoxin C |
| SEC➣Senior Executive Council (US DoD) |
| SEC➣SDH Equipment Clock |
| SEC➣Seminole Electric Cooperative, Inc. |
| SEC➣Series Elastic Component (anatomy) |
| SEC➣Sustainable Energy Communities |
| SEC➣Specialist Engineering Contractors Group |
| SEC➣Single Edge Cartridge |
| SEC➣Spiritual Enrichment Conference (Heritage Christian University) |
| SEC➣Société des Employés de Commerce (French: Society of Commercial Employees; Switzerland) |
| SEC➣Society for Economic Botany |
| SEC➣Société d'Entomologie du Canada |
| SEC➣Social Economy Centre |
| SEC➣Special Education Consortium |
| SEC➣Secondary Electron Conduction |
| SEC➣Sapporo Electronics Center (Japan) |
| SEC➣Sistema Europeo di Conti |
| SEC➣Source Evaluation Committee |
| SEC➣Scalable Enterprise Computing (Dell) |
| SEC➣Software Evaluation Criteria (informatics, avionics) |
| SEC➣Spoiler Elevator Computer (Airbus) |
| SEC➣Spatial Error Concealment |
| SEC➣Submarine Element Coordinator |
| SEC➣Shanghai Education Commission |
| SEC➣Salvo Errore Calculi (Latin: after extensive calculations) |
| SEC➣Support Equipment Change |
| SEC➣Scientific Ethics Committee (UNESCO) |
| SEC➣Synchronous Equipment Clock |
| SEC➣Shelf Edge Current |
| SEC➣Scientific Estimates Committee |
| SEC➣Switching Equipment Congestion signal (CCS #7/ITU-T) |
| SEC➣Scintillator Electromagnetic Calorimeter |
| SEC➣Subject Electoral Commission (Russian Federation) |
| SEC➣Supreme Eiye Confraternity |
| SEC➣Southern Episcopal Church |
| SEC➣Shanghai Economic Commission |
| SEC➣School Energy Coalition (Canada) |
| SEC➣Service Evaluation Center |
| SEC➣SONET/SDH Equipment Clock |
| SEC➣Self Evident Correction |
| SEC➣Société d'Études Camerounaises (French) |
| SEC➣Sydney Education Centre (Australia) |
| SEC➣Special Support Equipment Change |
| SEC➣Systems Engineering Council |
| SEC➣Strategic Excellence Projects |
| SEC➣Service Etrangers et Confédérés (French: Foreign and Confederate Service; Switzerland) |
| SEC➣Sequential Events Controller (US NASA) |
| SEC➣Spinal Extremity Correction (treatment) |
| SEC➣Single End Cane (physical therapy) |
| SEC➣Sun Energy Corporation (El Salvador) |
sec - 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
sec - (of champagne) moderately dry