Microsoft Office Outlook. http://office.microsoft.com/ja-jp/outlook/default.aspx
iCal. http://www.apple.com/jp/ical/
Microsoft Office Project. http://office.microsoft.com/ja-jp/project/default.aspx
Bellotti, V., Dalal, B., Good, N., Flynn, P., Bobrow, D. G. and Ducheneaut, N.: What a To-Do: Studies of Task Management Towards the Design of a Personal Task List Manager, Proc. SIGCHI Conference on Human Factors in Computing Systems, pp. 735-742(2004).
Bellotti, V., Duchenaut, N., Howard, M. and Smith, I.: Taking email to task: The design and evaluation of a task management centered email tool, Proc. CHI 2003 Conference on Human Factors in Computer Systems, pp. 345-352(2003).