| S&TD | Science and Technology Directorate 
| Others |
| ST&D | Stop Texting and Driving
| Others |
| STD | Doctor of Sacred Theology
| Others |
| STD | LocoScript Standard
| Others |
| STD | Sacrae Theologiae Doctor
| Others |
| STD | Salinity, Temperature, and Depth
| Others |
| STD | Santo Domingo, Venezuela
| Others |
| STD | Sao Tome Dobra
| Others |
| STD | Sao Tomean Dobra
| Others |
| STD | Save The Date
| Others |
| STD | Save To Disk
| Others |
| STD | Saves The Day
| Others |
| STD | Scheduled Time of Departure
| Others |
| STD | Scriptures Temple Dating
| Others |
| STD | Secondary Telecom District
| Others |
| STD | Security Tools Distribution
| Others |
| STD | Seize The Day
| Others |
| STD | Selection Transmit Diversity
| Others |
| STD | Selling The Drama
| Others |
| STD | Semantic Type Definition
| Others |
| STD | Set Direction
| Others |
| STD | Set Direction Flag
| Others |
| STD | Severe Tire Damage
| Others |
| STD | Sexual Tension Disorder
| Others |
| STD | Sexual Transmitted Disease
| Others |
| STD | Sexual Transmitted Diseases
| Others |
| STD | Sexually Transmitted Disease
| Others |
| STD | Sexually Transmitted Diseases
| Others |
| STD | Sexualy Transmited Disease
| Others |
| STD | Sheep Transmitted Disease
| Others |
| STD | Shoot The Dummy
| Others |
| STD | Short Term Debt
| Others |
| STD | Short Term Disability
| Others |
| STD | Short Term of Duty
| Others |
| STD | Short Tiny Dancers
| Others |
| STD | Short-Term Depression
| Others |
| STD | Short-Term Disability
| Others |
| STD | Shut The Door
| Others |
| STD | Shuttle Test Director
| Others |
| STD | Sigma Tau Delta
| Others |
| STD | Simon Tissot Dupont
| Others |
| STD | Simple To Design
| Others |
| STD | Skeletal Transcript Database
| Others |
| STD | Skin Test Dose
| Others |
| STD | Skinnies Trannies and Drops
| Others |
| STD | Skip Tooth Design
| Others |
| STD | Small Testicle Disorder
| Others |
| STD | Small Tiny Dogs
| Others |
| STD | Small Trimaran Design
| Others |
| STD | Snails Taste Delicious
| Others |
| STD | Soft Touch Denial
| Others |
| STD | Software Test Description
| Others |
| STD | Software Test Document
| Others |
| STD | Software Tool and Die
| Others |
| STD | Solar Terrestrial Dispatch
| Others |
| STD | Some Thing Duh
| Others |
| STD | Someone Truly Divine
| Others |
| STD | Split The Difference
| Others |
| STD | Spyro The Dragon
| Others |
| STD | ST-segment depression
| Others |
| STD | Standard Time Departure
| Others |
| STD | Standard Transmission Difficulties
| Others |
| STD | Standard Trunk Dialing
| Others |
| STD | Standing Tremor Disorder
| Others |
| STD | Star Trek Discovery
| Others |
| STD | Staroffice Template Drawing
| Others |
| STD | Started Trial Dog
| Others |
| STD | State Territory District
| Others |
| STD | State Transition Diagram
| Others |
| STD | State Transition Diagram graphics file
| Others |
| STD | STD Transmitting Dinosaur
| Others |
| STD | Sterilized Testing Developer
| Others |
| STD | Stop The Disease
| Others |
| STD | Stop, Treat, and Destroy
| Others |
| STD | Store Indirect to Data Space
| Others |
| STD | Strategic Technical Directorate
| Others |
| STD | Stuart Tyrrell Developments (Company)
| Others |
| STD | Studio
| Others |
| STD | Stunde
| Others |
| STD | Subarashii Tomodachi Doushi (means Best Friends)
| Others |
| STD | Subscriber Trunk Dialing
| Others |
| STD | Subscriber Trunk Dialling
| Others |
| STD | Subscribers Trunk Dialling
| Others |
| STD | Substitute Trustee's Deed
| Others |
| STD | Sunbeam Talbot Darracq
| Others |
| STD | Super Toddler Drool
| Others |
| STD | Super Tool Destruction
| Others |
| STD | Super Turbo Diesel
| Others |
| STD | Super Twist Display
| Others |
| STD | Supertech Dino
| Others |
| STD | Suspend To Disk
| Others |
| STD | Sweet Translucent Dreams
| Others |
| STD | Synchronous Time Division
| Others |
| STD | Synthetic Training Device
| Others |
| STD | Syrian Terrorist Detector
| Others |