- ISS
- International Space Station (Governmental » NASA)* Injury Severity Score (Medical » Physiology)* Institute of Social Studies (Academic & Science » Universities)* In School Suspension (Community » Educational)* International Superstar Soccer (Community » Sports)* Information Systems Security (Governmental » Military)* Input to State Stability (Academic & Science)* Instrument Sales And Service (Business » General)* Internet Security Service (Internet)* Integrated Sounding System (Academic & Science » Ocean Science)* Initial Send Sequence (Computing » Networking)* Inspection Selection System (Governmental » Military)* Instructional Support Staff (Academic & Science » Universities)* Impotent Sea Snakes (Miscellaneous » Funnies)* Intelligence Systems Secretariat (Governmental » US Government)* International Students Service (Academic & Science » Universities)* Interactive Survivability Simulation (Governmental » Military)* Internet Server Supplement (Computing » Networking)* Integrated Systems Support (Governmental » Military)* Immigrant Social Services (Governmental » US Government)* Instant Space Station (Miscellaneous » Funnies)* Inclination Sensor System (Academic & Science » Ocean Science)* Indiana Science Standards (Community » Educational)* Ion Scattering Spectrometry/Spectroscopy (Academic & Science » Electronics)* Institute Of Silly Strings (Miscellaneous » Funnies)
Abbreviations dictionary. 2012.