ɪn kəmpjˈuːɾɪŋ, ɐn ˈɪnpʊt ˈaʊtpʊt mˈɛmɚɹi mˈænɪdʒmənt jˈuːnɪt ˈaɪəmˌuː ɪz ɐ mˈɛmɚɹi mˈænɪdʒmənt jˈuːnɪt ˌɛmˌɛmjˈuː kənˈɛktɪŋ ɐ dᵻɹˈɛktmˈɛmɚɹiˈæksɛs kˈeɪpəbəl dˌiːˌɛmˈeɪkˈeɪpəbəl aɪ slˈæʃ ˈoʊ bˈʌs tə ðə mˈeɪn mˈɛmɚɹi.
In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) connecting a direct-memory-access–capable (DMA-capable) I/O bus to the main memory.