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Undeniably there is still far to go , but the trail has been blazed . With the advent of the World-Wide Web , links have come into the mainstream of writing and publishing , but these links are unidirectional - - there 's no way to know if a link has been made to your document , and no way to attach comments of your own to documents you read on the Web . This upgrade has been successfully launched ; however , the database will be continually updated and expanded to include more records . One critical element in this transformation has been the retreat of the military to the barracks . The video highlights are recorded as digital video in both Windows Media format and Apple QuickTime format ( the CD-ROM contains two full-length versions of the video so that it will play on both PCs and Macs ) . VPN technology at present works best for encrypting traffic between two known points that are accepted as valid destinations for traffic : once a link has been established , the technology is used to encrypt the information which is sent , not for establishing the validity of the destination to which it is being sent .