..mdb - Microsoft Access database
.accdb - Office Access 2007 database file format
.mdf - Microsoft SQL Server primary datafile
.ldb - MS Access Record-Locking Information
.ipd - InstallPROG 6 EDBS install database
.fdb - Database file
.rem - ACT! database maintenance file
.sav - SPSS database file
file extension SIF - Autodesk spatial index
.SIFFile extension SIF description:
Spatial indexes are used by spatial databases (databases which store information related to objects in space) to optimize spatial queries. Indexes used by non-spatial databases cannot effectively handle features such as how far two points differ and whether points fall within a spatial area of interest.
Associated applications to file extension SIF:
Company / developer:
Autodesk, Inc.
AutoCAD® is a CAD development platform that provides tools to build custom AutoCAD-based software products for specific markets and extend design information to users outside the traditional CAD community. You can easily create industry-specific products that offer only the features, commands, menus, and design data that your customers require.
AutoCAD OEM is licensed to independent software developers, corporate developers, and system integrators who need to
- Deliver a product that requires CAD functionality but is not targeted at traditional CAD users
- Build products that can read and create DWG files that are fully compatible with AutoCAD DWG files
- Create host programs that run an application in a child window or through a web page
- Deliver products with scaled feature sets at scaled price points Provide an AutoCAD-based platform that cannot be customized or extended by end users
- Replace an aging CAD system and take advantage of new AutoCAD software technologies