Abbreviated PIM, a type of software application designed to help
users organize random bits of information. Although the category
is fuzzy, most PIMs enable you to enter various kinds of textual
notes — reminders, lists, dates — and to link these bits of
information together in useful ways. Many PIMs also include
calendar, scheduling, and calculator programs.

Exactly what I want to do. =)

personal information manager – Webopedia.com