View source for IAppSystem Derived Systems

Gui:
*[[IVGui]] - Interface to core vgui components

Rendering:
*[[IStudioRender]] - Studio Render interface
*[[IStudioDataCache]] - Responsible for caching studio render data (models, etc.)
*[[IMaterialSystem]] - Responsible for managing and rendering materials and their components including shaders and textures. Can be thought of as essentially a DirectX wrapper that also handles texture and shader loading.

Audio:
*[[ISoundEmmiterSystemBase]] - Base class for sound emitter system handling

Console:
*[[ICVar]] - DLL interface for ConVars and ConCommands.

Physics:
*[[IPhysics]]

File IO:
*[[IFileSystem]] - Provides file loading and parsing functions

Platform Interface:
*[[ISurface]] - Wraps contextless windows system functions