sawlog - selective call number
- secondary-selective arrangement
- secondary-selective substation
- secondary-side arrangement
- secondary-side inspection
- secondary-to-primary turn ratio
- secondee program
- secondee program general principles
- secondment of personnel
- Seconds Saybolt Furol
- Seconds Saybolt Universal
- secrecy
- secrecy channel
- secret information
- secret information security system
- secret intelligence device
- secret key cryptography
- secret key distribution
- secret language
- secret sharing
- secret wood nail
- secret writing
- secret-key cipher
- secretaire
- secretariat
- secretariat taskforce on preparation a feasibility study
- secretary
- Secretary for Environment, Safety and Health
- Secretary for Human Resources and Administration
- Secretary for International Energy Policy
- Secretary for National Energy Policy and International Affairs
- Secretary for Oversight
- Secretary of Commission
- Secretary of Energy
- secretion
- sectile
- sectinal elevation
- section
- section (of the budget), subsection
- section boundary
- section box
