I think IT Ecosystem means what is the means of some special words in IT, I find some example about this. If you want to more you can check this here.
Element
All elements that interact within our IT "ecosystem" are instances of subclasses of Element.
Application
A single process, image, context, or code that is executed by a Platform. Also, a tightly integrated suite of such that is referred to in aggregate as a single Application instance.
Database
A collection of data, electronic or hardcopy. Not the technology that renders access to the database (that's often a DBServer). Some databases are "bundled" with an Application and are not represented by a separate Database instance.
Hardware
The actual bare metal underlying other, more ephemeral, Elements.
GeneralProcessor
General-purpose hardware, such as a Dell, IBM, or Sun computer. Unused as yet.
SpecialProcessor
Special-purpose hardware, such as a load balancer.
Storage
Storage-specific hardware, such as SAN and NAS devices.
Liveware
People, groups of people, and activities conducted by these. Don't want an org chart here. Rather, some Liveware instances may be necessary to have a self-contained portrayal of interrelated Elements.
Group
A collection of Persons undertaking a common Program.
Person
A specific human, or a role that one might occupy.
Program
A suite of related activities carried out by people in support of some identified aspect of the organization's mission. Example: "help desk" (4tech).
Platform
A software Element that Hosts other Elements.
AppServer
An application server, such as JBOSS, Tomcat, or ColdFusion.
ASP
Application Service Provider
DBServer
A database server that may Host one or more Databases. Usually an instance of a relational database technology such as Oracle, MS SQL Server, or MySQL.
Host
A physical or virtual machine, i.e., a general purpose operating system platform which runs software processes.
VMPresenter
A platform that virtual machines run on.
WebServer
An HTTP server.
ITEcoRelation
All reified relations among instances of the Element class are subclasses of ITEcoRelation.
Hosts
Provides (part of) the environment in which the hosted instance operates.
Domain: Hardware, Platform.
Range: Database, Platform, Application.
Is-part-of
Constitutes an essential part of a larger aggregate. Allows the aggregate to be the referent of a relationship which may in fact refer to one or more of its parts.
Domain: Database, Hardware, Program, Platform, Application.
Range: Program, Application.
Is-server-to
A run-time relationship in which the destination Element opens a connection to or initiates a transaction with the source Element.
Domain: Platform, Application.
Range: Platform, Application.
Modifies
Changes the content or configuration of.
Domain: Application.
Range: Database, Hardware, Platform, Application.
Other
Other or unknown types of relationships. If you must use Other, make sure to say something meaningful in its Notes property.
Domain: All classes.
Range: All classes.
Supports
Provides a benefit to without hosting, serving, or being a part of.
Domain: Database, Liveware, Application.
Range: Database, Hardware, Program, Platform, Application.
Examples: a Person or Group may support an Application. An Application may support a Program.
Xfers-data-to
Transfers data to, exclusive of run-time client-server interactions. Typically a batch export/import.
Domain: Database, Application.
Range: Database, Platform, Application.
ecosystemwhen they should be using the wordsystemis that system has traditionally come to mean a single machine. – Pithikos Aug 19 '14 at 09:17