This document discusses various types of external sources of finance for companies, including shares and preference shares. It provides details on what shares are, the different types of shares (equity/ordinary shares), rights that come with shares like voting rights and claims on profits/assets. It also discusses the merits and demerits of equity financing for both companies and shareholders. Preference shares are also covered, outlining the four types and merits for companies and shareholders as a source of finance, as well as some disadvantages.