- Numerals
- Recent Buddhas
- Sacca / Noble Truth
- Foundation of Mindfulness
- Brahma Vihara Practice
- Guardian deities
- Mahabhuta
- Miscellaneous
Numerals
- Hindu-Arablic numeral : 4
- Roman numeral : IV
Recent Buddhas
- Kakusandha
- Konagamana
- Kassapa
- Gautama
Sacca / Noble Truth
- Dukkha : Unsatisfactoriness / Misery / Suffering
- Samudiya : Cause of suffering
- Nirodha : Cessation of suffering
- Magga : The Path / The Middle Way
Foundation of Mindfulness
- Contemplation of the kaya / body
- Contemplation of the vedana / feeling
- Contemplation of the citta / mind
- Contemplation of the dhamma / general objects — not covered by the above three
Brahma Vihara Practice
- Metta / Loving kindness / Unbounded love
- Karuna / Compassion
- Mudita / Sympathetic joy / Altruistic joy
- Uppekkha / Equanimity
Guardian deities
- Dhatarattha (East)
- Virulhaka (South)
- Virupkkha (West)
- Kuvera (North)
Mahabhuta
- Patthavi / Earth element
- Tejo / Fire element
- Apo / Water or liquid element
- Vayo / Air or wind element
Miscellaneous
- Four sided figures : Rectangle, Square, Parallelogram, Parallepiped, Rhombus
- Baseball : first base, second base, third base, home plate
- Games : Four quarters (e.g. Football, Basketball)
- Rowing : Coxless fours, Coxed fours, Quadruple sculls
- Education : Freshman, Sophomore, Junior, Senior
- April : 4th month of the Gregorian Calendar
Categories: Number