What do you call all those things that change the enterprise? The collective noun for projects?

The simple answer is a portfolio - a portfolio of projects. Sounds about right, and most people (I think) would agree .... But there are still some terminology problems .

Should we have used the term program instead of project? What about the smaller granularity items that are the maintenance or production support changes? Shouldn't they be included in the portfolio?

These may seem somewhat picky formalities but it does indicate that there is no consensus on such terms. Even as PM-BOK tries to cover the project space and ITIL the operational change space, a holistic perspective of what constitutes change to the enterprise is lacking. Certainly from the business viewpoint, organizational change/transformation still has to be considered.

I have been struggling with these terminology questions as I attempt to write a specification for a reporting tool being prototyped as part of my research. But given my inability to find some consistent terminology I have decided that a key feature will need to be the ability to have a user-defined "skin". That way an organization to pick the language that it finds most appropriate ...  but it surely its not that difficult to have some standard language in this area?