And a move away from iCal to Calendar and away from Address Book to Contacts.

FORBES: With Apple's OS X Mountain Lion Moving Toward iOS, Are We Finally Going To See Touchscreen Macs?

Indeed, Apple's iSync--a tool for synchronizing personal information between the computer and disparate mobile devices--and its calendar software iCal both saw upgrades just last week.

FORBES: Magazine Article

What you are really buying with a PowerBook is the underlying OS and Apple's growing suite of Web-centric personal apps such as iCal, iTunes and iPhoto.

FORBES: Magazine Article

As expected this update has a TON of fixes, including stuff in Active Directory, AirPort, BTMM, Dashboard, Dock, Finder, iCal, iChat, iSync, Mail, Preview, Safari, Time Machine, and more -- the choicer of we'll be publishing after the break.

ENGADGET: Apple releases OS X 10.5.2 update, tons of fixes

Syncs with iCal and Exchange calendars.

FORBES: Apple: Live From The WWDC; OSX Lion, iOS 5; iCloud

That gives both Microsoft and Apple plenty of time to figure out the details of making Entourage compatible with other Apple applications, iCal--a personal calendar program, its Address Book application and even iSync, which is designed to let the Mac synchronize information between the desktop and several types of mobile devices.

FORBES: Magazine Article