This document provides an overview of the Open Geospatial Consortium (OGC) and the Web Feature Service (WFS) standard for accessing geospatial vector data over the web. It discusses OGC's role in developing interoperability standards, the motivation for web services, how geospatial features and geometries are modeled using GML, and the core WFS operations including getCapabilities, DescribeFeatureType, and GetFeature. It demonstrates executing WFS requests using GeoServer and uDIG client.