Wikipedia
Indology (or South Asian studies) is the academic study of the history and cultures, languages, and literature of the Indian subcontinent (most specifically the modern-day states of India, Pakistan, Bangladesh, Sri Lanka, Maldives, Nepal and the eastern parts of Afghanistan), and as such is a subset of Asian studies.
The term Indology or (in German) Indologie is often associated with German scholarship, and is used more commonly in departmental titles in German and continental European universities than in the anglophone academy. In the Netherlands the term Indologie was used to designate the study of Indonesian history and culture in preparation for colonial service in the Dutch East Indies.
Specifically, Indology includes the study of Sanskrit literature and Hinduism along with the other Indian religions, Jainism, Buddhism and Pāli literature, and Sikhism. Dravidology is the separate branch dedicated to the Dravidian languages of South India.
Some scholars distinguish Classical Indology from Modern Indology, the former more focussed on Sanskrit and other ancient language sources, the latter on contemporary India, its politics and sociology.