doc.Products.odbc-ingres-st The Single-Tier ODBC Drivers for CA-Ingres conform to the common architectural perceptions of an ODBC driver -- a single component installed on a desktop, workstation, or application server machine that depends on additional database specific networking middleware (from the relevant database vendor) for local or remote database connectivity.The OpenLink Single-Tier Drivers for CA-Ingres are a Type A class driver developed using the Ingres OpenAPI call level interface and assumes the pre-installation of Ingres-Net depending on your Ingres Server release.These drivers are currently available for Ingres II versions 1.x, 2.x and beyond. [[/images/aodbcst.gif|]] /Oracle Single-Tier Architecture Diagram Image scaled down; Click to enlarge./ This driver is available for Windows, Linux and Unix(most popular flavours) Operating systems.