CD-ROM technology revolutionized libraries in the late 20th century by allowing users to access information from computers rather than visiting the physical library. This reduced the gatekeeping role of librarians and democratized access to knowledge. While CD-ROMs were initially expensive, their costs declined and they provided a convenient centralized source of information. However, the rise of the Internet in the 1990s increased access speeds and made information even more available anytime, anywhere, reducing the need for CD-ROMs as an information delivery method.