Carrom is a tabletop game of Indian origin in which players flick discs, attempting to knock them to the corners of the board. The game is very popular in the Indian subcontinent, and is known by various names in different languages. In South Asia, many clubs and cafés hold regular tournaments. Carrom is commonly played by families, including children, and at social functions. Different standards and rules exist in different areas. It became very popular in the United Kingdom and the Commonwealth during the early 20th century. It also became popular in the United Arab Emirates and the rest of the Persian Gulf and the Arabian peninsula during the Arab-Indian spice trade.

Boric acid, more specifically orthoboric acid, is a compound of boron, oxygen, and hydrogen with formula B(OH)3. It may also be called hydrogen orthoborate, trihydroxidoboron or boracic acid. It is usually encountered as colorless crystals or a white powder, that dissolves in water, and occurs in nature as the mineral sassolite. It is a weak acid that yields various borate anions and salts, and can react with alcohols to form borate esters.