A company is a voluntary association of individuals formed for conducting business, characterized by distinct name, limited liability, legal personality, and perpetual succession. It can be categorized based on formation (chartered, statutory, registered), liability (limited, guarantee, unlimited), and public investment (private, public), with specific capital structures including authorized, issued, subscribed, and paid up. The document elaborates on share capital management, types of shares, issue processes, and accounting treatments for share transactions, including premium and discount on shares.