tɹɐdˈɪʃənəli, ˈɔːl kəmpjˈuːɾɚz ænd ˈɑːpɚɹˌeɪɾɪŋ sˈɪstəmz hæv ɪŋklˈuːdᵻd ɐ mˈeɪntənəns fˈʌŋkʃən, jˈuːzd tə dɪtˈɜːmɪn wˈɛðɚɹ ɐ pɹˈoʊɡɹæm ɪz wˈɜːkɪŋ kɚɹˈɛktli.
Traditionally, all computers and operating systems have included a maintenance function, used to determine whether a program is working correctly.