On Writing may refer to:

• A Memoir of the Craft, a memoir by American author Stephen King
• On Writing (Hemingway), a story fragment by American writer Ernest Hemingway
• Stein On Writing, advice for writers by American writer Sol Stein

• Musa al-Houla
• Musa Al-Koni
• Musa Al-Taamari
• Musa Al-Zoubi
• Musa Araz
• Musa arunachalensis
• Musa arunchalensis
• Musa aurantiaca
• MUSABA
• Musabaev
• Musabaeva
• Mus'ab Al-Batat
• Musa Baluku
• Musa Bamaiyi
• Musa banksii
• Musabaqah Tilawatil Quran
• Musabaqah Tilawatil Qur'an
• Musa Barrow
• Musabayev
• Musabayeva
• Musabek
• Musabeyli, Alapli
• Musabeyli, Alaplı
• Mus'ab ibn al-Zubayr
• Mus`ab ibn `Umair