| J(Z)CCS | J(z) Conserving Centrifugal Sudden Approximation (in Molecular Collisions | - | Computer Acronyms(common) |
| J(Z)CCS | J(z)-conserving Coupled States Method (for Rotationally Inelastic Atom-molecule Collisions | - | Computer Acronyms(common) |
| JAERI | Japanese Atomic Energy Research Institute | - | Computer Acronyms(common) |
| JAICI | Japan Association For International Chemical Information | - | Computer Acronyms(common) |
| JAIE | Japan Association Of Ion Exchange | - | Computer Acronyms(common) |
| JAK | Janus Kinase | - | Computer Acronyms(common) |
| JAM | Junctional Adhesion Molecule | - | Computer Acronyms(common) |
| JANAF | Joint Army Navy Air Force | - | Computer Acronyms(common) |
| JAPIO | Japan Patent Information Organization | - | Computer Acronyms(common) |
| JAXA | Japan Aerospace Exploration Agency | - | Computer Acronyms(common) |
| JCAHO | Joint Commission On Accreditation Of Healthcare Organizations | - | Computer Acronyms(common) |
| JCAMP | Joint Committee On Atomic And Molecular Physical Data | - | Computer Acronyms(common) |
| JCBN | IUPAC-IUB Joint Commission On Biochemical Nomenclature | - | Computer Acronyms(common) |
| JCPDS | Joint Committee On Powder Diffraction Standards | - | Computer Acronyms(common) |
| JEIDA | Japan Electronic Industry Development Association | - | Computer Acronyms(common) |
| JEIP | Joint Emission Inventory Program | - | Computer Acronyms(common) |
| JERS | Japanese Earth Resources Satellite | - | Computer Acronyms(common) |
| JESS | Joint Expert Speciation System | - | Computer Acronyms(common) |
| JESSI | Joint European Submicron Silicon Initiative | - | Computer Acronyms(common) |
| JET | Joint European Torus | - | Computer Acronyms(common) |
| JEV | Japanese Encephalitis Virus | - | Computer Acronyms(common) |
| JFCA | Japan Fine Ceramics Association | - | Computer Acronyms(common) |
| JFET | Junction Field-effect Transistor | - | Computer Acronyms(common) |
| JGOFS | Joint Global Ocean Flux Study | - | Computer Acronyms(common) |
| JI | Joint Implementation [with Regard To Greenhouse Gas Emission Redn.] | - | Computer Acronyms(common) |
| JICST | Japanese Information Center Of Science And Technology | - | Computer Acronyms(common) |
| JIMO | Jupiter Icy Moons Orbiter | - | Computer Acronyms(common) |
| JIPID | Japanese International Protein Information Databank | - | Computer Acronyms(common) |
| JIS | Japan Industrial Standard | - | Computer Acronyms(common) |
| JISC | Japanese Industrial Standards Committee | - | Computer Acronyms(common) |
| JJT | Josephson Junction Transistor | - | Computer Acronyms(common) |
| JKR | Johnson-Kendall-Roberts Contact Model | - | Computer Acronyms(common) |
| JME | Juvenile Myoclonic Epilepsypar | - | Computer Acronyms(common) |
| JME | Java Molecular Editor | - | Computer Acronyms(common) |
| JMTR | Japan Material Testing Reactor | - | Computer Acronyms(common) |
| JNK | C-Jun N-terminal Kinase | - | Computer Acronyms(common) |
| JOFET | Josephson Field Effect Transistor | - | Computer Acronyms(common) |
| JOIDES | Joint Oceanographic Institutions For Deep Earth Sampling | - | Computer Acronyms(common) |
| JOSO | Joint Organization For Solar Observations | - | Computer Acronyms(common) |
| JPCRD | Journal Of Physical And Chemical Reference Data | - | Computer Acronyms(common) |
| JPDR | Japan Power Demonstration Reactor | - | Computer Acronyms(common) |
| JPEG | Joint Photographic Expert Group | - | Computer Acronyms(common) |
| JPL | Jet Propulsion Laboratory | - | Computer Acronyms(common) |
| JPO | Japanese Patent Office | - | Computer Acronyms(common) |
| JSAC | Japan Society For Analytical Chemistry | - | Computer Acronyms(common) |
| JSGA | Japanese Spaceguard Association | - | Computer Acronyms(common) |
| JSMS | Japan Society Of Materials Science | - | Computer Acronyms(common) |
| JSR | Jet-stirred Reactor | - | Computer Acronyms(common) |
| JTU | Jackson Turbidity Unit | - | Computer Acronyms(common) |
| JULIC | Juelich Isochronous Cyclotron | - | Computer Acronyms(common) |
| JURIS | Justice Retrieval And Inquiry System | - | Computer Acronyms(common) |
| JWF | Jastrow Wave Function | - | Computer Acronyms(common) |
| JWKB | Jeffreys-Wentzel-Kramers-Brillouin (scattering Potential) | - | Computer Acronyms(common) |
