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オペランド
http://dic.yahoo.co.jp/dsearch?enc=UTF-8&p=operand&dtype=1&dname=1na&stype=0&pagenum=1&index=05032200
プログラムが動く仕組み
http://itpro.nikkeibp.co.jp/members/ITPro/ITBASIC/20000929/2/
RAID
http://storage-system.fujitsu.com/jp/term/raid/01.html
DAS
http://storage-system.fujitsu.com/jp/term/beginner/connection/das/