A dynamic-link library (DLL) is a module that contain functions and data that can be used by another module (application or DLL). A DLL can define two kinds of functions: exported and internal. The exported functions are intended to be called by other modules, as well as from within the DLL where they are defined. Internal functions are typically intended to be called only from within the DLL where they are defined. Although a DLL can export data, its data is generally used only by its functions. However, there is nothing to prevent another module from reading or writing that address.

DAT file extension could represent following file types:

- Data file

- A data file extension used to designate an error message in a inbound internet email message (Microsoft Exchange Server v 5.0)

- WordPerfect Merge Data

- Extension used for some MPEG files

- Yahoo Messenger archive file

PPS format is a PowerPoint Slideshow format. If you do not have PowerPoint, Microsoft has a free PowerPoint viewer. Use their download site to search for it. Another option is to use the free OpenOffice.org office suite. The presentation portion of the suite can both display and edit PowerPoint presentations.

KML files are very often distributed as KMZ files, which are zipped KML files with a .kmz extension. When a KMZ file is unzipped, a single doc.kml is found along with any overlay and icon images referenced in the KML.

Generic database file extension; could be created by a number of different database programs; may also be imported into multiple database programs.

XLS is a proprietary binary file format called Binary Interchange File Format (BIFF) as its primary format used by Excel to store spreadsheet information. Excel 2007 uses Office Open XML as its primary file format, an XML-based container similar in design to XML-based format called XML Spreadsheet (XMLSS), first introduced in Excel 2002.

ICA is a file extension used by Citrix Client files. They are used by Citrix client applications to connect to Citrix XenApp, Citrix XenDesktop and other Citrix server applications.

ENCRYPTED is a file extension which is used to store encrypted information. It is could be used by different software service providers and there is no specific format for information stored inside files with encrypted file extensions.

JNLP is short for Java Network Launching Protocol. This format is used by Java to download and launch applications over the network. JNLP applications typically don't run from user internet browser.