The Excel DATEDIF function - calculating the difference between two dates
How old are the computers in the test lab, part 2
http://www.meadinkent.co.uk/xl_birthday.htm
i d e a * i d e a - Excelでウルトラシンプルなグラフを作成する方法（続編）
At least I speak Excel.
http://www.ideaxidea.com/archives/2006/08/exce...
