If an application is only going to be run by the original programmer and/or a few colleagues, there may be no need for a pretty graphical user interface, leaving the application leaner, faster and easier to maintain.
ɪf ɐn ˌæplɪkˈeɪʃən ɪz ˈoʊnli ɡˌoʊɪŋ təbi ɹˈʌn baɪ ðɪ ɚɹˈɪdʒɪnəl pɹˈoʊɡɹæmɚ ænd slˈæʃ ɔːɹ ɐ fjˈuː kˈɑːliːɡz, ðɛɹ mˈeɪ biː nˈoʊ nˈiːd fɚɹə pɹˈɪɾi ɡɹˈæfɪkəl jˈuːzɚɹ ˈɪntɚfˌeɪs, lˈiːvɪŋ ðɪ ˌæplɪkˈeɪʃən lˈiːnɚ, fˈæstɚɹ ænd ˈiːziɚ tə meɪntˈeɪn.