Historically, private treasury of the Muslim caliphs to cover their personal, family and executive expenditures.
Al-akl bi l-batil
Certificate of Musharakah
Al-waqf al-’ahli
Bai‘ darbah al-gha’is
Al-bai‘ al-mun‘aqad
Kharaj al-wazifah
Tujjar Mutajawilin
Al-wadi‘ah bil ‘ajr
Dhawu al fara'id
Shirkah al-tadamun