Kind of informations

• Book: a collection of records, each record having one or more fields. Useful to manage a lot of data of the same kind.
• Todo list: a list of things to do with states completed, not completed and aborted.
• Task list: a list of tasks with date range when it should be done.
• Budget: make a sum of items with associated amounts.
• Notes: a place where to write any text.
• Planner: each hour, day and month may have notes. Presented day by day, one month at a time or a full year calendar.

Useful and practical usages

• Address book
• Rolodex
• Buy list
• Birthday indicators
• List of expenses
• And much more !