| EST | Encéphalopathie Spongioforme Transmissible | In French | → Infectious diseases |
| EST | Eastern Standard Time | In English | → Standardization |
| EST | Energy Saving Trust | In English | → Energy economics |
| EST | Electroshock Therapy | In English | → Medicine |
| EST | Entziclopedia Temàtica Sarda | [SC] | → Encyclopaedias, reference works |