Glossary definitions here and within the chapters are from the official ITIL Glossary of Terms that can be found at

Alert A notification that a threshold has been reached, something has changed or a failure has occurred.

Capabilities The ability of an organisation, person, process, application, configuration item or IT service to carry out an activity. Capabilities are intangible assets of an organisation.

Change Change is the addition, modification or removal of anything that could affect IT services. The scope should include all IT services, CIs, processes, documentation etc.

Configuration item A configuration item (CI) is any component that needs to be managed in order to deliver an IT service. Information ...

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