ɪt pɹəvˈaɪdᵻd ɛkstˈɛndᵻd səpˈoːɹt fɔːɹ jˈuːzɚdᵻfˈaɪnd fˈʌŋkʃənz, ɛkstˈɜːnəl siːkwˈɛnʃəl dˈɪsk fˈaɪlz, ænd lˈɪŋkɪŋ wɪð ɐsˈɛmblɚ lˈæŋɡwɪdʒ mˈɑːdʒuːlz fɔːɹ dɪvˈaɪs səpˈoːɹt ænd ˈɑːpɚɹˌeɪɾɪŋ sˈɪstəm ˈɪntɚfˌeɪsᵻz.
It provided extended support for user-defined functions, external sequential disk files, and linking with assembler language modules for device support and operating system interfaces.