Origin of com-Classical Latin com- from Old Latin com (L cum), with from Indo-European an unverified form kom, closely along, next to, with from source Classical Greek koinos, common
or col- or con- or cor-
Origin of com-Middle English from Latin from Old Latin com ; see kom in Indo-European roots.
- Alternative form of dot-com.
.com - Computer Definition
(1) (.COMmercial) A top-level Internet domain used mainly by businesses; however, it is not restricted and a .com domain can be registered for any purpose. Because the "dot-com" address is used by major companies throughout the world, it is the most coveted top-level domain. See .name, Internet domain name and dot-com.
(2) A type of executable program. See COM file.
(1) See computer-on-module.
(2) See computer output microfilm.
(3) (Component Object Model) A Microsoft architecture for building software modules (objects) that are executed in Windows. Parts of Windows itself and Microsoft's own applications are built as COM objects. Beginning with Windows 95 and Windows NT, COM provides the interfaces between objects, and Distributed COM (DCOM) allows them to run remotely. COM Objects COM objects can be small or large. They can be written in several programming languages and perform any kind of processing. Whenever it needs its services, a program can call the object, which can be run remotely over a network, originally known as "Distributed COM" (DCOM). Automation (OLE automation) Standard applications, such as word processors and spreadsheets, can be written to expose their internal functions as COM objects, allowing them to be "automated" instead of manually selected from a menu. For example, a script could be written to extract data from a database, summarize and chart it in a spreadsheet and place the results into a text document. See COM automation. Controls (OLE controls, ActiveX controls) Applications can invoke COM objects, called "controls," that blend in and become just another part of the program. An industry of third-party, ready-made controls for the Windows programmer has been created. ActiveX controls can also be downloaded from the Internet to make a Web page perform any kind of processing. See ActiveX control. Compound Documents and ActiveX Documents Microsoft's OLE compound documents are based on COM, which lets one document be embedded within or linked to another (see OLE). ActiveX Documents are extensions to OLE that allow a Web browser, for example, to view not only Web pages, but any kind of document (see ActiveX Documents). Programming Interfaces Increasingly, Microsoft is making its standard programming interfaces conform to the COM object model so that there is continuity between all interfaces. See DAO, ADO and OLE DB.
It Can Be ConfusingMicrosoft first used the term OLE to refer to its COM-based architecture, then later dropped that designation in favor of ActiveX. Since both OLE and ActiveX are based on COM, the term COM is also used. As a result, any combination of the words COM, OLE and ActiveX followed by the words control, object and component may mean the same thing, or they may not, depending on context.
Enhancements to the Microsoft Component Object Model (COM) that enable programmers to develop COM objects more easily. For example, COM+ allows native C++ calls to be translated into the correct COM call. In addition, instead of defining COM interfaces in the traditional IDL language, they can be defined by more familiar programming syntax.