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AppleScript, JavaScript, Perl, PHP, Ruby, Python, various shell script dialects, and other popular scripting languages are available in Mac OS X. Developers can make their applications scriptable, enabling automation of repetitive tasks through AppleScript scripts. To make automation even easier, the Automator application offers a simple drag-and-drop interface for users to create sophisticated workflows involving Mac OS X system services and Apple applications. Developers and script writers can also create their own Automator actions, allowing applications, shell scripts, and AppleScript scripts to be called from within Automator workflows.

Learning paths for scripters, system administrators, and application developers.   Essential information about using and supporting scripts and automation.   C and Objective-C API references, organized by framework.
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Dashboard Reference (HTML) (PDF)
Describes the API for implementing Dashboard widgets.
JavaScript 2009-02-04
iSync JavaScript Reference (HTML) (PDF)
Describes a few JavaScript classes used to write phone connection functions in iSync Plug-in Maker.
JavaScript 2009-01-09
JavaScriptCore Framework Reference (HTML)
Describes the API for evaluating JavaScript programs from within a C-based program
JavaScript 2008-04-08
AppleScript Studio Terminology Reference (HTML) (PDF)
Describes the scripting terminology for AppleScript Studio, through version 1.4.
AppleScript, Carbon, Cocoa, Tools 2007-10-31
NSScriptKeyValueCoding Protocol Reference (HTML) (PDF)
Describes the informal protocol used to provide additional key-value coding capabilities in a scriptable application.
AppleScript, Cocoa 2007-10-31
NSScriptCommand Class Reference (HTML) (PDF)
Describes the class used to represent a scripting statement and the information needed to perform the operation it specifies.
AppleScript, Cocoa 2007-07-20
NSScriptClassDescription Class Reference (HTML) (PDF)
Describes the class used to encapsulate the scriptability information for a scriptable class.
AppleScript, Cocoa 2007-07-17
Apple Event Manager Reference (HTML) (PDF)
Describes the C API for interapplication communication using Apple events.
AppleScript, Carbon 2007-07-13
NSAppleScript Class Reference (HTML) (PDF)
Describes the class that provides the ability to load, compile, and execute scripts.
AppleScript, Cocoa 2007-07-10
NSPositionalSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify an insertion point in a container relative to another object in the container.
AppleScript, Cocoa 2007-06-29
NSScriptObjectSpecifier Class Reference (HTML) (PDF)
Describes the abstract class used to instantiate objects that represent references to scriptable objects.
AppleScript, Cocoa 2007-06-29
Scripting Bridge Framework Reference (HTML) (PDF)
Describes the interface that allows Cocoa applications to communicate with scriptable applications.
Scripting Bridges 2007-05-29
Open Scripting Architecture Reference (HTML) (PDF)
Describes the API for compiling and executing scripts in applications and writing scripting components.
AppleScript, Carbon 2007-05-07
NSAppleEventDescriptor Class Reference (HTML) (PDF)
Describes the class used to access the basic data structures in an Apple event.
AppleScript, Cocoa 2007-04-10
NSScriptCommandDescription Class Reference (HTML) (PDF)
Describes the class used to provide a description of a script command.
AppleScript, Cocoa 2007-04-10
NSScriptSuiteRegistry Class Reference (HTML) (PDF)
Describes the class used as the top-level repository of scriptability information for an application at runtime.
AppleScript, Cocoa 2007-04-10
NSIndexSpecifier Class Reference (HTML) (PDF)
Describes the position of an object in a collection.
AppleScript, Cocoa 2007-04-01
Automator Framework Reference (HTML) (PDF)
Describes the Objective-C API for creating and working with actions used by the Automator application.
Automator, Cocoa, General 2006-10-26
NSCloseCommand Class Reference (HTML) (PDF)
Describes the class used to close a scriptable object or objects--typically a document or window.
AppleScript, Cocoa 2006-06-28
NSRelativeSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify an object in a collection by its position relative to another object.
AppleScript, Cocoa 2006-06-28
NSSpecifierTest Class Reference (HTML) (PDF)
Describes the class used to apply a test to compare a specified object to another object.
AppleScript, Cocoa 2006-06-28
NSWhoseSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify every object in a container that matches a defined condition.
AppleScript, Cocoa 2006-06-28
NSAppleEventManager Class Reference (HTML) (PDF)
Describes the class used to work with Apple event handler routines and to suspend and resume event handling.
AppleScript, Cocoa 2006-05-23
NSAppleScript Additions Reference (HTML) (PDF)
Describes additions to the NSAppleScript class to provide syntax-highlighted script source.
AppleScript, Cocoa 2006-05-23
NSCloneCommand Class Reference (HTML) (PDF)
Describes the class used to clone a scriptable object or objects.
AppleScript, Cocoa 2006-05-23
NSComparisonMethods Protocol Reference (HTML) (PDF)
Describes the interface for default comparison methods in the NSSpecifierTest class.
AppleScript, Cocoa 2006-05-23
NSCountCommand Class Reference (HTML) (PDF)
Describes the class used to count the number of objects of a specified class in the specified object container.
AppleScript, Cocoa 2006-05-23
NSCreateCommand Class Reference (HTML) (PDF)
Describes the class used to create a specified scriptable object.
AppleScript, Cocoa 2006-05-23
NSDeleteCommand Class Reference (HTML) (PDF)
Describes the class used to delete a specified scriptable object or objects.
AppleScript, Cocoa 2006-05-23
NSExistsCommand Class Reference (HTML) (PDF)
Describes the class used to determine whether a specified scriptable object exists.
AppleScript, Cocoa 2006-05-23
NSGetCommand Class Reference (HTML) (PDF)
Describes the class used to get the specified value or object from the specified scriptable object.
AppleScript, Cocoa 2006-05-23
NSLogicalTest Class Reference (HTML) (PDF)
Describes the class used to perform logical operations in determining the scriptable objects a command acts on.
AppleScript, Cocoa 2006-05-23
NSMiddleSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify the middle object in a collection.
AppleScript, Cocoa 2006-05-23
NSMoveCommand Class Reference (HTML) (PDF)
Describes the class used to move the specified scriptable object or objects.
AppleScript, Cocoa 2006-05-23
NSNameSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify an object in a collection (or container) by name.
AppleScript, Cocoa 2006-05-23
NSPropertySpecifier Class Reference (HTML) (PDF)
Describes the class used to specify a simple attribute value, a one-to-one relationship, or all elements of a to-many relationship.
AppleScript, Cocoa 2006-05-23
NSQuitCommand Class Reference (HTML) (PDF)
Describes the class used to quit the specified application.
AppleScript, Cocoa 2006-05-23
NSRandomSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify an arbitrary object in a collection.
AppleScript, Cocoa 2006-05-23
NSRangeSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify a range of objects in a container through two delimiting objects.
AppleScript, Cocoa 2006-05-23
NSScriptCoercionHandler Class Reference (HTML) (PDF)
Describes the class that provides a mechanism for converting one kind of scripting data to another.
AppleScript, Cocoa 2006-05-23
NSScriptExecutionContext Class Reference (HTML) (PDF)
Describes the class that provides a shared instance of the context in which the current script command is executed.
AppleScript, Cocoa 2006-05-23
NSScriptingComparisonMethods Protocol Reference (HTML) (PDF)
Describes the informal protocol used to define a set of methods for comparing script objects.
AppleScript, Cocoa 2006-05-23
NSScriptObjectSpecifiers Protocol Reference (HTML) (PDF)
Describes the informal protocol used by scriptable objects to provide a fully specified object specifier to themselves.
AppleScript, Cocoa 2006-05-23
NSScriptWhoseTest Class Reference (HTML) (PDF)
Describes the abstract class used to represent expressions for testing scriptable object inclusion.
AppleScript, Cocoa 2006-05-23
NSSetCommand Class Reference (HTML) (PDF)
Describes the class used to set values in a scriptable object.
AppleScript, Cocoa 2006-05-23
NSUniqueIDSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify an object in a container by unique ID.
AppleScript, Cocoa 2006-05-23
NSWindowScripting Protocol Reference (HTML) (PDF)
Describes the category on NSWindow for scripting basic properties and commands of windows in scriptable applications.
AppleScript, Cocoa 2006-05-23