Bharatiya Darshan ki Rooprekha" by Harendra Prasad Sinha is a comprehensive guide to Indian philosophy, delving into its rich history and diverse schools of thought. The book likely covers key philosophical systems such as:

1. Vedic and Upanishadic Philosophy: Discusses the earliest texts of Indian philosophy, including the Vedas and Upanishads, focusing on concepts like Brahman (ultimate reality), Atman (soul), and the nature of existence.

2. Samkhya: Analyzes this dualistic philosophy that differentiates between purusha (consciousness) and prakriti (matter).

3. Yoga: Explores the practices and principles outlined by Patanjali, emphasizing mental and physical discipline.

4. Nyaya: Examines the logical and epistemological school that emphasizes reasoning and the acquisition of valid knowledge.

5. Vaisheshika: Investigates this atomistic school, which focuses on categorization and the nature of reality.

6. Mimamsa: Looks into the rituals and interpretations of the Vedas, emphasizing dharma (duty) and the performance of rituals.

7. Vedanta: Delves into the end portion of the Vedas, with sub-schools like Advaita (non-dualism), Vishishtadvaita (qualified non-dualism), and Dvaita (dualism).

8. Buddhist Philosophy: Covers the teachings of Gautama Buddha, focusing on concepts like the Four Noble Truths, the Eightfold Path, and the nature of suffering and liberation.

9. Jain Philosophy: Explores the teachings of Mahavira, emphasizing non-violence, non-possessiveness, and the multiplicity of viewpoints (anekantavada).

10. Charvaka: Discusses this materialistic and skeptical school of thought that rejects the supernatural and emphasizes direct perception.

The book provides an outline of these philosophies, their historical development, key texts, and influential thinkers.