In many organizations, Information Technology (IT) has become crucial in the support, the sustainability and the growth of the business. This pervasive use of technology has created a critical dependency on IT that calls for a specific focus on IT Governance. IT Governance consists of the leadership and organizational structures, processes and relational mechanisms that ensure that the organization's IT sustains and extends the organization's strategy and objectives. This records and interprets some important existing theories, models and practices in the IT Governance domain and aims to contribute to the understanding of IT Governance.