The industry gradually moved away from proprietary Japanese hardware to the burgeoning DOS platform, and then later in the decade to Windows. Throughout the nineties, "bishōjo" games underwent an evolution from being one of the most technologically demanding types of games (because their detailed 2D graphics required a large amount of storage space by the standards of early computers) to one of the least (they rarely use 3D graphics). Thus, more than regular games, the main employees required by "bishōjo" game companies today are not programmers, but artists and writers.