All applications follow one of the following industry-standard Application Architecture Patterns

• Client-Proxy Server: Acts as a concentrator for many low-speed links to access a server.
• Customer Support: Supports complex customer contact across multiple organisations.
• Reactor: Decouples an event from its processing.
• Replicated Servers: Replicates servers to reduce burden on central server.
• Layered Architecture: A decomposition of services such that most interactions occur only between neighboring layers.
• Pipe and Filter Architecture: Transforms information in a series of incremental steps or processes.
• Subsystem Interface: Manages the dependencies between cohesive groups of functions (subsystems).
• Service: Users accessing transactions on a 24×7 basis (a.k.a. user-to-business)
• Collaboration: Users working with one another to share data and information (a.k.a. user-to-user)
• Information Aggregation: Data from multiple sources aggregated and presented across multiple channels (a.k.a. user-to-data)
• Extended Enterprise: Integrating data and processes across enterprise boundaries (a.k.a. business-to-business)