SimilarityRank
CD-ROM 0.913 27333
DVD-ROM 0.854 99370
CDROM 0.833 94337
DVDs 0.792 11379
CD-R 0.776 76182
DVD-R 0.768 97922
hardcopy 0.763 64105
hard-copy 0.760 96589
DVD's 0.759 36319
PDFs 0.756 34441
diskette 0.747 88279
CDs 0.740 9860
MP3s 0.740 46903
formats 0.734 6799
E-books 0.732 91614
e-books 0.732 23923
DVD 0.715 3387
eBooks 0.714 25725
VHS 0.713 25675
CD's 0.712 35678
disks 0.710 15069
ebooks 0.709 20456
digitized 0.708 35133
downloadable 0.706 15233
workbooks 0.700 48759