So that it still can survive , EncyclopÃ dia Britannica , Inc. has kept on telling people that the Britannica is good and accurate , made the encyclopedia cheaper , and made electronic versions on CD-ROM , DVD and the World Wide Web . To remain competitive , EncyclopÃ dia Britannica , Inc. has stressed the reputation of the Britannica , reduced its price and production costs , and developed electronic versions on CD-ROM , DVD , and the World Wide Web .