ˈɑːmæd jˈaʊsɛf ˈælhˈæsən dʒˈuːn twˈɛnti fˈaɪv, nˈaɪntiːnhˈʌndɹɪd twˈɛnti fˈaɪv ˈeɪpɹəl twˈɛnti ˈeɪt, tˈuː θˈaʊzənd twˈɛlv wʌzɐ pˌæləstˈɪniːən slˈæʃ sˈɪɹiən slˈæʃ kɐnˈeɪdiən hɪstˈoːɹiən ʌv ˈæɹɐbˌɪk ænd ɪslˈɑːmɪk sˈaɪəns ænd tɛknˈɑːlədʒi, ˈɛdʒuːkˌeɪɾᵻd ɪn dʒɚɹˈuːsələm, kˈaɪɹoʊ, ænd lˈʌndən wɪð ɐ pˌiːˈeɪtʃ dˈiː ɪn mᵻkˈænɪkəl ˌɛndʒɪnˈɪɹɪŋ fɹʌm jˌuːnɪvˈɜːsᵻɾi kˈɑːlɪdʒ lˈʌndən.
Ahmad Yousef Al-Hassan () (June 25, 1925 – April 28, 2012) was a Palestinian/Syrian/Canadian historian of Arabic and Islamic science and technology, educated in Jerusalem, Cairo, and London with a PhD in Mechanical engineering from University College London.