| Acronym | Definition |
|---|
| EIS | Environmental Impact Statement |
| EIS | Enterprise Information Systems |
| EIS | Environmental Impact Study |
| EIS | Early Intervention Services |
| EIS | English Institute of Sport (UK) |
| EIS | Executive Information System |
| EIS | Electrochemical Impedance Spectroscopy |
| EIS | Epidemic Intelligence Service (CDC) |
| EIS | Enterprise Investment Schemes (UK financial information) |
| EIS | Educational Institute of Scotland |
| EIS | European Innovation Scoreboard |
| EIS | Environmental Information Systems |
| EIS | Entry Into Service (date) |
| EIS | Enterprise Information Services |
| EIS | Electronic Information Services |
| EIS | European Information System |
| EIS | Employee Information System |
| EIS | Engineering Installation Squadron |
| EIS | Enterprise Information Security |
| EIS | Early Intervention Specialist |
| EIS | Emergency Information System |
| EIS | Extreme Ultraviolet Imaging Spectrometer |
| EIS | Economic Information System |
| EIS | Eyes in the Sky |
| EIS | Engineering Information System |
| EIS | Essbase Integration Services (Hyperion) |
| EIS | Extended Instruction Set |
| EIS | Electronic Instrument System |
| EIS | Environmental Impact Survey |
| EIS | Eudora Internet Suite |
| EIS | Electrolyte-Insulator-Semiconductor |
| EIS | Expressive Intelligence Studio (University of California, Santa Cruz) |
| EIS | Engineering Integrity Society |
| EIS | Eritrean Islamic Salvation (Eritrea) |
| EIS | Enhanced Income Security |
| EIS | Eisenhower Interstate System |
| EIS | Environmental Impact System |
| EIS | Electronic Information Security |
| EIS | Elite Information Systems |
| EIS | Equipment In Service |
| EIS | Expanded Inband Signaling |
| EIS | End Item Specification |
| EIS | External Interface Specification |
| EIS | Electrically Isolated Silver (colloidal silver) |
| EIS | Enrollment Information Service (ACT, Inc.) |
| EIS | Expert Information System |
| EIS | Enhanced Information System |
| EIS | Effective Isotropic Sensitivity |
| EIS | Equipment Imbalance Surcharge (shipping industry) |
| EIS | Enhanced Imagery System |
| EIS | Ecoforestry Institute Society (British Columbia, Canada) |
| EIS | Enterprise Infrastructure Security Initiative (EPRI) |
| EIS | Event Information System |
| EIS | Enterprise Internet Services |
| EIS | Effluent Inventory System |
| EIS | Executive Interface System |
| EIS | Electron Impact Spectroscopy |
| EIS | Equipment Issue Scale |
| EIS | Executive Interface Structure |
| EIS | End Interruption Sequence |
| EIS | Electromagnetic Intelligence System |
| EIS | Economic Information Systems, Incorporated |
| EIS | Enforcement Investigation System |
| EIS | Escamilla Intermediate School (Texas) |
| EIS | Estimating Information System |
| EIS | Erasure Insertion Scheme |
| EIS | Emirates Internet Services (Abu Dhabi, UAE) |
| EIS | Employee Inquiry System |
| EIS | Electronics/Engineering Installation Squadron |
| EIS | Environmental Industry Council |
| EIS | Élément Important pour la Sûreté (French: Important Element in Security) |
| EIS | Employee Insight System (Questar) |
| EIS | Electronic Image Stabilization (photography) |
| EIS | Eastern Irish Sea |
| EIS | Enterprise Integration Suite (software) |
| EIS | European International School (Philippines) |
| EIS | Education Information Service (various organizations) |
| EIS | Electronic Ignition Systems |