| AI | Artificial Intelligence |
| BMD | Ballistic Missile Defense |
| cFS | Core Flight System |
| CSTN | Cognitive Satellite–Terrestrial Integrated Networks |
| CTI | Cyber Threat Intelligence |
| DCED | Distributed Collaborative Entrance Defense |
| DDoS | Distributed Denial of Service |
| DL | Deep Learning |
| DOA | Direction of Arrival |
| DoS | Denial of Service |
| DPD | Defense Plane Digest |
| DSSS | Direct Sequence Spread-Spectrum |
| DTN | Delay-Tolerance Network |
| DVB | Digital Video Broadcasting |
| DVB-S | Digital Video Broadcasting—Satellite |
| ECN | Explicit Congestion Notification |
| ETD | Entrance Traffic Digest |
| FHSS | Frequency Hopping Spread Spectrum |
| FSS | Fixed Satellite Service |
| GEO | Geostationary Earth Orbit |
| GMR | GEO-Mobile Radio |
| GNSS | Global Navigation Satellite System |
| GPS | Global Positioning System |
| GSE | General Stream Encapsulation |
| HAPS | High-Altitude Platform Station |
| HELLADS | High-Energy Liquid Laser Area Defense System |
| HTTP | Hypertext Transfer Protocol |
| IoT | Internet of Things |
| LEO | Low Earth Orbit |
| LiDAR | Light Detection and Ranging |
| MEO | Medium Earth Orbit |
| MIRACL | Mid-Infrared Advanced Chemical Laser |
| MISO | Multiple-Input Single-Output |
| ML | Machine Learning |
| MSNET | Mobile Satellite Communication Network |
| NFV | Network Function Virtualization |
| NMA | Navigation Message Authentication |
| NR | New Radio |
| NTN | Non-Terrestrial Network |
| OCS | Onboard Computer System |
| OPSPF | Orbit Prediction Shortest Path First |
| PD | Power Distortion |
| PHY | Physical Layer |
| PLA | People’s Liberation Army |
| PLS | Physical Layer Security |
| QKD | Quantum Key Distribution |
| QoS | Quality of Service |
| SAR | Synthetic Aperture Radar |
| SATCOM | Satellite Communication |
| SCA | Spreading Code Authentication |
| SCS | Satellite Communication System |
| SDN | Software-Defined Network |
| SDSN | Software-Defined Satellite Network |
| SDR | Software-Defined Radio |
| SLT | Secure LEO Trust |
| SM-3 | Standard-Missile 3 |
| SQM | Signal Quality Monitoring |
| SSL | Secure Socket Layer |
| STIN | Satellite–Terrestrial Integrated Network |
| SVM | Support Vector Machine |
| TDOA | Time Difference of Arrival |
| TESLA | Timed Efficient Stream Loss-Tolerant Authentication |
| TLS | Transport Layer Security |
| TOS | Type of Service |
| VoIP | Voice over Internet Protocol |