The Component are very useful in Software Industry because they only do some kind of operation like industry estimation process, testing the usability etc. Here you can see some different components software are available in market or industry. more or less those components are open source (free) but they can provide some limited services. but the some components are to buy some cost.
IBM’s System Object Model (SOM) in the early 1990s
Micro Soft Visual Basic and its components
OMG’s CORBA – Corporate Enterprise perspective (Object Management Group)
Micro Soft DCOM, ActiveX – Desktop prospective Sun Java, JavaBeans – Internet perspective.
