ˌaɪbˌiːˈɛmz pˌiːsˈiː dˌiːˌoʊˈɛs ˈɔːlsoʊ mˈɑːɹkɪɾᵻd æz ˌɛmˈɛsdˌiːˌoʊˈɛs baɪ mˈaɪkɹəsˌɑːft ɪnhˈɛɹɪɾᵻd ðə kənvˈɛnʃən baɪ vˈɜːtʃuː ʌv bˌiːɪŋ lˈuːsli bˈeɪst ˌɔn sˌiːpˈiː slˈæʃ ˈɛm, ænd wˈɪndoʊz ɪn tˈɜːn ɪnhˈɛɹɪɾᵻd ɪt fɹʌm ˌɛmˈɛsdˌiːˌoʊˈɛs.
IBM's PC DOS (also marketed as MS-DOS by Microsoft) inherited the convention by virtue of being loosely based on CP/M, and Windows in turn inherited it from MS-DOS.