Science

• The people of the Indus Civilization achieved great accuracy in measuring length, mass, and time
• Among the first to develop a system of uniform weights and measures
• Harappan engineers followed the decimal division of measurement for all practical purposes, including the measurement of mass as revealed by their hexahedron weights
• These chert weights were in a ratio of 5:2:1 with weights of 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50, 100, 200, and 500 units, with each unit weighing approximately 28 grams, similar to the English Imperial ounce or Greek uncia, and smaller objects were weighed in similar ratios with the units of 0.871.
• The weights and measures later used in Kautilya's Arthashastra (4th century BCE)
• Harappans evolved some new techniques in metallurgy and produced copper, bronze, lead, and tin