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USA on-Demand proposes future trends in "Software Architectures that solve the mentioned challenges above and Look Seriously at "Unified Software Architecture on-Demand (F-USA on-Demand) ." The rapid growth of technology, coupled with the tightened development time and production cost constraints, have imposed tremendous pressure and an intense desire for software enterprises to create new and innovative designs which could respond to rapidly changing business and operating environments. Therefore, enterprises must invest in building stable architectures based on conceptual knowledge more than application context. Any system based on a stable architecture is built in a way that captures the enduring goals that the software is supposed to meet. We refer to these emerging trends of architectures as Architectures on Demand as they are unlimited reusable, adaptable, customizable, extensible, Customizability, self-configurable, self-manageable, and unlimited applicability, according to the future requirements and changes in the operating environments. Adaptability refers to how software system architecture can accommodate changes in its environment constrained by the hardware and software. Customizability refers to the ability of the architecture to be managed and customized by an agent, its users, benefiting applications, and others. Extensibility means that the architecture includes mechanisms for expanding/enhancing the system with new capabilities without making major changes to the architecture and the underlying infrastructure. Good architecture has excellent design principles and guidelines to ensure such architecture's excellency. Self-configurable and self-manageable architectures refer to the architectures of systems that can manage and "self-heal" their properties dynamically at the level of components, connectors, and the underlying infrastructure. The crosscutting concern for all these properties is that dependability should continue to be maintained and evolve the adaptation of the architectures on demand.