| IUPAC | International Union of Pure and Applied Chemistry North Carolin, http://www.iupac.org |
| IUPAP | International Union of Pure and Applied Physics College Park, [MD], http://www.iupap.org |
| ICHO | International Chemistry Olympiad Kiel, http://www.icho.de |
| ICCC | International Conference on Coordination Chemistry |
| UNI | Union Network International |
| ITU | International Telecommunication Union Genf, http://www.itu.int |
| IUB | International Union of Biochemistry Heute: IUBMB |
| IAU | International Astronomical Union Paris, [F], http://www.iau.org |
| IMU | International Mathematical Union |
| ICU | International Clearing Union |
| TUI | Touristik Union International Hannover, http://www.tui.com/de |
| IRU | International Road Transport Union |
| IARU | International Amateur Radio Union |
| IUBMB | International Union of Biochemistry and Molecular Biology Bern, http://www.iubmb.unibe.ch |
| UNIPEDE | International Union of Producers and Distributors of Electric Energy |
| PL | Pure Luxe Theodore, {AL], http://pureluxecosmetics.com |
| PGA | Pure Grain Alcohol |
| UNITE HERE | Union of Needletrades, Industrial, and Textile Employees [UNITE] and the Hotel Employees and Restaurant Employees Union [HERE] New York City, [NY], http://www.unitehere.org |
| Adv. Chem. Ser. | Advances in Chemistry Series Zeitschrift |
| ckb | Chemistry Knowledge Base |
| NCW | National Chemistry Week |
| CSE | Chemistry Simulation Engine |
| MRC | Magnetic Resonance in Chemistry |
| SCF | Standard Chemistry Format |
| Toxicol. Environ. Chem. | Toxicological and Environmental Chemistry Zeitschrift |
| RSC | Royal Society of Chemistry |
| JBC | Journal of Biological Chemistry |
| Environ. Toxicol. Chem. | Environmental Toxicology and Chemistry Zeitschrift |
| CNIC | Committee on Nomenclature of Inorganic Chemistry |
| CORE | Chemistry Online Retrieval Experiment |
| J. Radioanal. Nucl. Chem. | Journal of Radioanalytical and Nuclear Chemistry Zeitschrift |
| ECTN | European Chemistry Thematic Network |
| EJOC | European Journal of Organic Chemistry |
| CSIR | Chemistry Software Information Resource |
| EJIC | European Journal of Inorganic Chemistry Druckausgabe ISSN: 1434-1948 |
| REC | Radiofrequency Encoded Combinatorial chemistry |
| PCCP | Physical Chemistry and Chemical Physics |
| ECCC | European Communities Chemistry Council |
| Appl. Stat. | Applied Statistics Zeitschrift |
| appl. | applied [engl.] angewandt |
| Appl. Opt. | Applied Optics Zeitschrift |
| ASAC | Austrian Society of Analytical Chemistry [engl.] Wien |
| Appl. Geogr. Dev. | Applied Geography and Development Zeitschrift |
| Appl. Ecol. Abstr. | Applied Ecology Abstracts Zeitschrift |
| Exp. Appl. Acarol. | Experimental and Applied Acarology Zeitschrift |
| ACT | Applied Computerized Telephony [HP] |
| Ann. Appl. Biol. | Annals of Applied Biology Zeitschrift |
| Ast | Applied System Technology |
| AS | Applied Science [engl.] Angewandte Wissenschaft |
| AEQ | Applied Economics Quarterly [engl.] Wirtschaftsfachzeitschrift der DIW |