| ES | Electrospray [used Before MS For Mass Spectrometry] | - | Computer Acronyms(common) |
| ES | Emission Spectroscopy (technique Suffix) | - | Computer Acronyms(common) |
| ES | Energy Sudden (approxn. In Scattering Calcns.) | - | Computer Acronyms(common) |
| ES | Embryonic Stem | - | Medical |
| ES | Eiffel Syndrome - From "I Fell On It" Excuse By Patient With A Foreign Object In The Rectum | - | NASA |
| ES | Escape System | - | Organizations |
| ES | Experiment Segment | - | Organizations |
| ES | Einsteinium - Exasecond | - | Astronomy |
| ES | El Salvador (FIPS 10-4 Country Code) -Electronic Warfare Support -Exasiemens - Spain (ISO 3166 Digram; From Espa?a)) | - | Astronomy |
| ES | Spanish Language (ISO 639-1 Code) | - | Astronomy |
| ES | error second (optical)
| - | Human Genome |
