<prompt> Translate the following text to EnglishIna maana, basi, kwa kivinjari ambacho kinaweza kupata hati za ndani na za nje kuwa sehemu muhimu ya mfumo - isipokuwa, kwa mfano, unaona vivinjari na mifumo ya uendeshaji kama vitu tofauti, na unaona Microsoft kama mazoezi ya kukataza wima chini ya kivuli cha kuboresha bidhaa.  <response>: It makes sense, then, for a browser that can find both internal and external documents to be an integral part of the system--unless, that is, you regard browsers and operating systems as still basically different things, and view Microsoft as practicing vertical foreclosure under the guise of product enhancement. 