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ParaDOS largely supplanted [[ROMDOS]] as the OS of choice among CPC users. Unlike ROMDOS, ParaDOS made no check for the presence of an AMSDOS ROM on sign-on. This enabled it to be used in ROM 7 as a direct replacement for AMSDOS, improving compatibility with programs which unthinkingly initialised ROM 7 alone. This, however, also cast some doubts on the propriety of its intellectual property stance. It is likely that ParaDOS would have been questioned more rigorously had it not been introduced towards the end of the CPC's commercial life.