• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 5 · Abstract Ideas and Concepts
• 54 · Process of Action
• 54B · Means and Characteristics of Means

54B4 · Efficiency

• 54B4(+4) · Efficiency (+ emblematical representation of concept)