These software programs run on a computer in order to convey the displayed information through voice (text-to-speech) or braille (refreshable braille displays) in combination with magnification for low vision users in some cases.
ðiːz sˈɔftwɛɹ pɹˈoʊɡɹæmz ɹˈʌn ˌɔn ɐ kəmpjˈuːɾɚɹ ɪn ˈɔːɹdɚ tə kənvˈeɪ ðə dɪsplˈeɪd ˌɪnfɚmˈeɪʃən θɹuː vˈɔɪs tˈɛksttəspˈiːtʃ ɔːɹ bɹˈeɪl ɹᵻfɹˈɛʃəbəl bɹˈeɪl dɪsplˈeɪz ɪn kˌɑːmbᵻnˈeɪʃən wɪð mˌæɡnɪfɪkˈeɪʃən fɔːɹ lˈoʊ vˈɪʒən jˈuːzɚz ɪn sˌʌm kˈeɪsᵻz.