| Rank | Abbreviation | Meaning |
|---|
| ***** | ESSO | Every Saturday and Sunday Off
| |
| **** | ESSO | English Skills for Staff Officers
| |
| ** | ESSO | Eastern States Standard Oil
| |
| * | ESSO | Enterprise Software and Services Offering
| |
| * | ESSO | Enterprise Single Sign-On
| |
| * | ESSO | Edinburgh Secondary Schools Orchestra
| |
| * | ESSO | Employee Self Service Online
| |
| * | ESSO | ethnic studies student organization
| |
| * | ESSO | Electronic Step by Step Office
| |
| * | ESSO | Standard Oil
| |
| * | ESSO | Earth System Sciences Organization
| |
| * | ESSO | European Society Of Surgical Oncology
| |
| * | ESSO | European Software Support Office
| |
| * | ESSO | Earth Science Support Office
| |
| * | ESSO | Estonian State Symphony Orchestra
| |
| * | ESSO | East Side Service Organization
| |
| * | ESSO | Esso Resources Canada
| |
| * | ESSO | Earth System Science Office
| |
| * | ESSO | ENVIRONMENTAL SCIENCE STUDENT ORGANIZATION
| |
| * | ESSO | Early Steps State Office
| |
| * | ESSO | Easter Seal Society Ontario
| |
| * | ESSO | Exeter Social Service Organization
| |
| * | ESSO | Eastman School Symphony Orchestra
| |
| * | ESSO | Economic and Social Statistics Office
| |
| * | ESSO | Executive Staff Support Officer
| |