| Name | Package | Description |
| Accessibility | Top Level | The Accessibility class manages communication with screen readers. |
| arguments | Top Level | An arguments object is used to store and access a function's arguments. |
| Array | Top Level | The Array class lets you access and manipulate indexed arrays. |
| AsBroadcaster | Top Level | Provides event notification and listener management capabilities that you can add to user-defined objects. |
| BevelFilter | flash.filters | The BevelFilter class lets you add a bevel effect to a variety of objects in Flash. |
| BitmapData | flash.display | The BitmapData class lets you create arbitrarily sized transparent or opaque bitmap images and manipulate them in various ways at runtime. |
| BitmapFilter | flash.filters | The BitmapFilter base class for all image filter effects. |
| BlurFilter | flash.filters | The BlurFilter class lets you apply a blur visual effect to a variety of objects in Flash. |
| Boolean | Top Level | The Boolean class is a wrapper object with the same functionality as the standard JavaScript Boolean object. |
| Button | Top Level | All button symbols in a SWF file are instances of the Button object. |
| Camera | Top Level | The Camera class is primarily for use with Macromedia Flash Communication Server, but can be used in a limited way without the server. |
| capabilities | System | The Capabilities class determines the abilities of the system and player hosting a SWF file, which lets you tailor content for different formats. |
| Color | Top Level | Deprecated since Flash Player 8 — The Color class has been deprecated in favor of the flash.geom.ColorTransform class. |
| ColorMatrixFilter | flash.filters | The ColorMatrixFilter class lets you apply a 4 x 5 matrix transformation on the RGBA color and alpha values of every pixel on the input image to produce a result with a new set of RGBA color and alpha values. |
| ColorTransform | flash.geom | The ColorTransform class lets you mathematically adjust all of the color values in a movie clip. |
| ContextMenu | Top Level | The ContextMenu class provides runtime control over the items in the Flash Player context menu, which appears when a user right-clicks (Windows) or Control-clicks (Macintosh) on Flash Player. |
| ContextMenuItem | Top Level | The ContextMenuItem class allows you to create custom menu items to display in the Flash Player context menu. |
| ConvolutionFilter | flash.filters | The ConvolutionFilter class applies a matrix convolution filter effect. |
| CustomActions | Top Level | The methods of the CustomActions class allow a SWF file playing in the Flash authoring tool to manage any custom actions that are registered with the authoring tool. |
| Date | Top Level | The Date class lets you retrieve date and time values relative to universal time (Greenwich mean time, now called universal time or UTC) or relative to the operating system on which Flash Player is running. |
| DisplacementMapFilter | flash.filters | The DisplacementMapFilter class uses the pixel values from the specified BitmapData object (called the displacement map image) to perform a displacement of an object on the Stage, such as a MovieClip instance. |
| DropShadowFilter | flash.filters | The DropShadowFilter class lets you add a drop shadow to a variety of objects in Flash. |
| Error | Top Level | Contains information about an error that occurred in a script. |
| ExternalInterface | flash.external | The ExternalInterface class is the External API, an application programming interface that enables straightforward communication between ActionScript and the Flash Player container; for example, an HTML page with JavaScript, or a desktop application with Flash Player embedded. |
| FileReference | flash.net | The FileReference class provides a means to upload and download files between a user's computer and a server. |
| FileReferenceList | flash.net | The FileReferenceList class provides a means to let users select one or more files for uploading. |
| Function | Top Level | Both user-defined and built-in functions in ActionScript are represented by Function objects, which are instances of the Function class. |
| GlowFilter | flash.filters | The GlowFilter class lets you apply a glow effect to various objects in Flash. |
| GradientBevelFilter | flash.filters | The GradientBevelFilter class lets you apply a gradient bevel effect to various objects in Flash. |
| GradientGlowFilter | flash.filters | The GradientGlowFilter class lets you apply a gradient glow effect to a variety of objects in Flash. |
| IME | System | The IME class lets you directly manipulate the operating system's input method editor (IME) in the Flash Player application that is running on a client computer. |
| Key | Top Level | The Key class is a top-level class whose methods and properties you can use without a constructor. |
| LoadVars | Top Level | You can use the LoadVars class to obtain verification of successful data loading and to monitor download progress. |
| LocalConnection | Top Level | The LocalConnection class lets you develop SWF files that can send instructions to each other without the use of fscommand() or JavaScript. |
| Locale | mx.lang | The mx.lang.Locale class allows you to control how multilanguage text is displayed in a SWF file. |
| Math | Top Level | The Math class is a top-level class whose methods and properties you can use without using a constructor. |
| Matrix | flash.geom | The flash.geom.Matrix class represents a transformation matrix that determines how to map points from one coordinate space to another. |
| Microphone | Top Level | The Microphone class lets you capture audio from a microphone attached to the computer that is running Flash Player. |
| Mouse | Top Level | The Mouse class is a top-level class whose properties and methods you can access without using a constructor. |
| MovieClip | Top Level | The methods for the MovieClip class provide the same functionality as actions that target movie clips. |
| MovieClipLoader | Top Level | This class lets you implement listener callbacks that provide status information while SWF, JPEG, GIF, and PNG files are being loaded into movie clips. |
| NetConnection | Top Level | The NetConnection class provides the means to play back streaming FLV files from a local drive or HTTP address. |
| NetStream | Top Level | The NetStream class provides methods and properties for playing Flash Video (FLV) files from the local file system or an HTTP address. |
| Number | Top Level | The Number class is a simple wrapper object for the Number data type. |
| Object | Top Level | The Object class is at the root of the ActionScript class hierarchy. |
| Point | flash.geom | The Point class represents a location in a two-dimensional coordinate system, where x represents the horizontal axis and y represents the vertical axis. |
| PrintJob | Top Level | The PrintJob class lets you create content and print it to one or more pages. |
| Rectangle | flash.geom | The Rectangle class is used to create and modify Rectangle objects. |
| security | System | The System.security class contains methods that specify how SWF files in different domains can communicate with each other. |
| Selection | Top Level | The Selection class lets you set and control the text field in which the insertion point is located (that is, the field that has focus). |
| SharedObject | Top Level | The SharedObject class is used to read and store limited amounts of data on a user's computer. |
| Sound | Top Level | The Sound class lets you control sound in a movie. |
| Stage | Top Level | The Stage class is a top-level class whose methods, properties, and handlers you can access without using a constructor. |
| String | Top Level | The String class is a wrapper for the string primitive data type, and provides methods and properties that let you manipulate primitive string value types. |
| StyleSheet | TextField | The StyleSheet class lets you create a StyleSheet object that contains text formatting rules for font size, color, and other styles. |
| System | Top Level | The System class contains properties related to certain operations that take place on the user's computer, such as operations with shared objects, local settings for cameras and microphones, and use of the Clipboard. |
| TextField | Top Level | The TextField class is used to create areas for text display and input. |
| TextFormat | Top Level | The TextFormat class represents character formatting information. |
| TextRenderer | flash.text | The TextRenderer class provides functionality for the advanced anti-aliasing capability of embedded fonts. |
| TextSnapshot | Top Level | TextSnapshot objects let you work with static text in a movie clip. |
| Transform | flash.geom | The Transform class collects data about color transformations and coordinate manipulations that are applied to a MovieClip object. |
| Video | Top Level | The Video class enables you to display live streaming video on the Stage without embedding it in your SWF file. |
| XML | Top Level | Use the methods and properties of the XML class to load, parse, send, build, and manipulate XML document trees. |
| XMLNode | Top Level | An XML document is represented in Flash by the XML class. |
| XMLSocket | Top Level | The XMLSocket class implements client sockets that let the computer running Flash Player communicate with a server computer identified by an IP address or domain name. |
| XMLUI | Top Level | The XMLUI object enables communication with SWF files that are used as custom user interfaces for the flash authoring tool's extensibility features (such as Behaviors, Commands, Effects, and Tools). |
