| SE | Support Equipment | Navy |
| SE | Seychelles (FIPS 10-4 country code) | Acronym |
| SE | Societas Europaea (form of business organization in the EU) | Acronym |
| SE | South-east | Acronym |
| SE | Sweden (ISO 3166 digram) | Acronym |
| SE | Synthetic Environment | Acronym |
| SE | System Engineering | Acronym |
| SE | Single Ended | computing |
| SE | Self Emulsifying | Chemistry abbreviations |
| SE | Singles Event | Community abbreviations |
| SE | Swingers Europe | Community abbreviations |
| SE | Sex Education | Educational abbreviations |
| SE | Special Education | Educational abbreviations |
| SE | Standard Error | Educational abbreviations |
| SE | Student Exercises | Educational abbreviations |
| SE | Super Effective | Educational abbreviations |
| SE | Service Entrance | Electronics abbreviations |
| SE | Simplified Electronics | Electronics abbreviations |
| SE | Single-Ended (TTL) driver | Electronics abbreviations |
| SE | Speech Enhancement | Electronics abbreviations |
| SE | Simplified Edition | computing abbreviations and acronyms |
| SE | Starter Edition | computing abbreviations and acronyms |
| SE | System Engineer | computing abbreviations and acronyms |
| SE | System Error | computing abbreviations and acronyms |
| SE | System Expansion | computing abbreviations and acronyms |
| SE | Second Edition | media abbreviations and acronyms |
| SE | Select Edition | media abbreviations and acronyms |
| SE | Signature Edition | media abbreviations and acronyms |
| SE | Silent Edition | media abbreviations and acronyms |
| SE | Simple Edition | media abbreviations and acronyms |
| SE | Sled Edition | media abbreviations and acronyms |
| SE | Sound Effects | media abbreviations and acronyms |
| SE | Special Edition | media abbreviations and acronyms |
| SE | Special Effects | media abbreviations and acronyms |
| SE | Sports Extra | media abbreviations and acronyms |
| SE | Standard Elite | media abbreviations and acronyms |
| SE | Start Edition | media abbreviations and acronyms |
| SE | Supervisory Edition | media abbreviations and acronyms |
| SE | Scouting Experimental | Military abbreviations |
| SE | Self Erecting | Military abbreviations |
| SE | Site Exploitation | Military abbreviations |
| SE | Sniper Edition | Military abbreviations |
| SE | Special Equipment | Military abbreviations |
| SE | Spherical Error | Military abbreviations |
| SE | Shell Extension | software abbreviations and acronyms |
| SE | Slower Edition | software abbreviations and acronyms |
| SE | Software engineering | software abbreviations and acronyms |
| SE | Software Entwicklung (software development) | software abbreviations and acronyms |
| SE | Standard Edition | software abbreviations and acronyms |
| SE | Stat Editor | software abbreviations and acronyms |
| SE | Studio Edition | software abbreviations and acronyms |
| SE | Spirit Energy | sports abbreviations |
| SE | Sports Edition | sports abbreviations |
| SE | Sports Editor | sports abbreviations |
| SE | Sports Entertainment | sports abbreviations |
| SE | Start End | sports abbreviations |
| SE | Scientific and Engineering | University abbreviations |
| SE | Student Edition | University abbreviations |