At which layer does RPA interact with multiple applications?

RPA primarily interacts with multiple applications at the Presentation layer. This layer is where the automation occurs through user interfaces, making it possible for software robots to replicate the actions a human would perform, such as clicking buttons, entering data into fields, or extracting information from displays. The Presentation layer involves working with graphical user interfaces (GUIs) or screens, which are tangible interfaces of applications that users engage with.

RPA tools are designed to manipulate those interfaces directly, allowing them to engage with various applications seamlessly. This capability is essential as many enterprise applications, especially legacy systems, may not have APIs or other means of integration, making the Presentation layer a critical point of interaction for robotic process automation.

In contrast, the Object layer typically refers to the interaction with components of applications at a more abstract level, not directly with the user interface. The Data layer pertains to the handling and processing of data itself, and "None" suggests that there is no interaction, which does not accurately represent how RPA operates. Thus, focusing on the Presentation layer is key to understanding how RPA interacts with various applications effectively.