Features:	Microsoft Outlook	Apple iCal Calendar	Google Calendar	Now Software Now-Up-to-Date	Claris Organizer
File Commands:
Multiple files open	yes	yes 1	yes	yes	no
Save/Open as Text	no	no	no	yes	no
Importing	yes 2	yes 2	no	yes 2	no
Exporting	no 3	yes 4	no	yes 4	no
Printing	yes	yes	yes 5	yes	yes
Edit Commands:
Undo/Redo	yes	yes	yes 6	yes	yes 6
Cut/Copy/Paste:
Text	yes	yes	yes	yes	yes
Items	yes	no	no	yes	no
From Other Cal Tools	?	yes	no	yes	no
Search	yes	yes	yes 7	yes	yes
Scheduling:
Single-Person Appointments	no	no	no	yes	yes
Multi-Person Meetings	yes	yes	no	yes	no
Tasks	yes	yes	yes	yes	yes
Simple Events	yes	yes	yes	yes	yes
Other Kinds of Items	yes	yes	yes	no	yes
Scheduling Details:
Recurring Items	yes	yes	yes	yes	yes
Reminders	yes	yes	yes	yes	yes
Categories	yes	yes	no	yes	yes
Location	no	no	no	no	no
Security	no	no	no	yes	no
Priority	yes	no	no	yes	yes 8
Detail Notes	yes	yes	yes	yes	no
Overlapping Items	yes	yes	yes	yes	yes
Viewing:
Day	yes	yes	yes	yes	yes
Week	yes 9	yes	yes	yes	yes
Month	yes	yes	yes	yes	yes
Year	no	no	no	yes	no
Multiple-Item Views	yes	no	no	yes	no
Next/Prev/Goto Navigation	yes	yes	yes	yes	yes
Lists	yes	yes	no	yes	yes 10
Filtering	?	yes 11	no	yes	yes
Other Users	yes	yes	yes	yes	no
Windows	yes	yes	no	yes	no
Custom Views	?	no	no	yes	yes
Administration:
Users	yes	yes	yes	yes	no
Groups	yes	no	yes	yes	no
Rooms	no	no	no	yes	no
Default Options	yes	yes	no	yes	yes
Other Features:
Multi-User Support	yes 12	yes 12	yes 13	yes	no
Wide Variety of Options	no 14	no 14	no	yes	yes 14
Good Help:	yes	yes	yes	yes	yes
UI Characteristics:
Multiple Windows Well Supported	yes	no	no	yes	no
Convenient Date Input Formats	yes	yes	no	yes	yes
Nice Style Overall	no	no	no	yes	no

Footnotes:

¹ Multiple calendars can be open, but they are merged into a single window.

² Importing is limited to selected types of calendars and other data.

³ Closed proprietary calendar format precludes export to most other calendar tools.

⁴ Exporting to some other tools except outlook; see previous note.

⁵ Limited printing forms.

⁶ One level undo only.

⁷ Search is weak.

⁸ Priority can be set for tasks.

⁹ Provides work week and full week.

¹⁰ Lists are available for tasks.

¹¹ Filtering features are limited

¹² Multi-user support provided by an external software component.

¹³ Multi-user support provided via the Internet.

¹⁴ Provides an OK set of options, but more is expected for a tool from such a prominent commercial vendor