Safari history
Safari was was first released in 2003 and became the default browser in Mac OS X 10.3 Panther.  Version 2 was released in 2005 as the default version for Mac OS X 10.4 Tiger.  Safari 3 is the current version and is the default version included with Mac OS X Leopard.  Note that Safari 3 was included as part of the Tiger 10.4.11 update released in late 2007.  The first non-beta release of Safari for Windows for Windows Vista and Windows XP was released in March 2008.

Safari technology
Safari is based on the Konqueror KHTML rendering engine and JavaScriptCore which Apple has packaged together into WebCore, Safari's rendering engine.  A screen shot of the Safari browser is shown below:

Key Features
The current version of Safari contains features found in many of today's modern web browsers.  Safari includes several unique Apple-based features that are capable of leveraging many Mac OS X technologies.  Several noteworthy features include:

• Tabbed browsing
• Pop-up blocking
• Built-in RSS reader
• Emailing Webpages
• SnapBack
• Integrated Google search
• Bookmarking and history
• Web form auto-completion
• PDF viewing
• Secure surfing
• Private browsing
• Parental Controls
• Spell checking
• Built-in password with the Mac OS X keychain
• Web Clip
• Standards compliance