This document summarizes key aspects of company law related to shares and share capital in India. It defines what a share is, discusses the nature and types of shares such as preference shares, equity shares, and deferred shares. It also covers topics like allotment of shares, share certificates, transfer of shares, issue of shares at premium, types of share capital, rights of ordinary and preference shareholders, alteration and reduction of share capital, and reorganization of capital. The document provides definitions and classifications to concisely outline some fundamental concepts in company financial structure and securities.