This User’s Guide provides a complete user oriented description of the VEDA-FE (front-end) software as it applies to the MARKAL model, and more specifically to the SAGE model (A System for Analysis of Global Energy) resident at the Energy Information Administration (EIA), an agency of the United States Department of Energy (USDOE). SAGE is a MARKAL-based world bottom-up energy model with 15 linked regions. All examples will be taken from the SAGE model. In the rest of this manual, we shall therefore refer to the software as VEDA-SAGE. Other version of this guide will also exist for general MARKAL models and for TIMES models. Moreover, there is a separate Users’ Guide describing VEDA-BE version 4, which applies a to wide variety of models, including (but not limited to) energy bottom-up models such as MARKAL, SAGE, and TIMES.