DirectX is a collection ofApplication Programming Interfaces (APIs) that grew from a host of other APIs that had titles starting with the world Direct, such asDirect3D,DirectSound,DirectDraw etc. It is used on Microsoft systems such as the Windows operating system, and theXbox 360 console. DirectX is used by developers for multimedia tasks which include game programming, video processing and computer aided design. Direct3D is part of the DirectX package and is widely used for game development to create 3D graphics environments for titles used with Microsoft windows and both the Xbox consoles.

OtherDirectX related glossary:

DirectDraw
Direct2D
Direct3D
DXGI
DirectInput
DirectPlay
DirectPlay Voice
DirectSound
DirectSound3D
DirectMusic
DirectX Audio
DirectX Media
DxDiag
DirectX Media Objects
DirectSetup
XAudio2

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