Works with other applications and devices
iCal can interoperate with other Mac OS X applications as well as Apple and non-Apple hardware.  For example, it can share information Mail, Address Book , and third-party applications.  iCal can also share information with other Macs, an iPhone or iPod, and other devices.

The image below shows the default screen of iCal in Mac OS X Leopard. 

The following image shows that the default view has been changed to include a mini month on the bottom left corner.  Notice how two calenders show up on the upper left pane, these are the two default calenders in iCal.

Several other iCal views can be created, this guide showed just two.