The flash.utils package contains utility classes, such as data structures like ByteArray.

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	Function	Description
	clearInterval	Cancels a specified setInterval() call.
	clearTimeout	Cancels a specified setTimeout() call.
	describeType	Produces an XML object that describes the ActionScript object named as the parameter of the method.
	escapeMultiByte	Returns an escaped copy of the input string encoded as either UTF-8 or system code page, depending on the value of System.useCodePage.
	getDefinitionByName	Returns a reference to the class object of the class specified by the name parameter.
	getQualifiedClassName	Returns the fully qualified class name of an object.
	getQualifiedSuperclassName	Returns the fully qualified class name of the base class of the object specified by the value parameter.
	getTimer	Used to compute relative time.
	setInterval	Runs a function at a specified interval (in milliseconds).
	setTimeout	Runs a specified function after a specified delay (in milliseconds).
	unescapeMultiByte	Returns an unescaped copy of the input string, which is decoded from either system code page page or UTF-8 depending on the value of System.useCodePage.

	Interface	Description
	IDataInput	The IDataInput interface provides a set of methods for reading binary data.
	IDataOutput	The IDataOutput interface provides a set of methods for writing binary data.
	IExternalizable	The IExternalizable interface provides control over serialization of a class as it is encoded into a data stream.

	Class	Description
	ByteArray	The ByteArray class provides methods and properties to optimize reading, writing, and working with binary data.
	CompressionAlgorithm	The CompressionAlgorithm class defines string constants for the names of compress and uncompress options.
	Dictionary	The Dictionary class lets you create a dynamic collection of properties, which uses strict equality (===) for key comparison.
	Endian	The Endian class contains values that denote the byte order used to represent multibyte numbers.
	Proxy
	Timer	The Timer class is the interface to timers, which let you run code on a specified time sequence.