Which two general types of keyboards are commonly in use today?

The commonly used types of keyboards today can be classified into two general categories: virtual and physical. Physical keyboards are tangible devices, such as mechanical or membrane keyboards, that require physical interaction to type on. Virtual keyboards, on the other hand, are software-based and can be found on touchscreen devices, where keys are represented on the screen.

While other options mention various features and technologies associated with keyboards, they do not accurately reflect the primary categories that encompass the majority of keyboard types used today. For instance, while mechanical keyboards are popular within the physical category due to their tactile feedback and durability, they do not represent a separate category in the broader context. The same applies to touchscreen keyboards, which fall under the virtual category rather than being a standalone type. Similarly, alphanumeric keys are often found on both physical and virtual keyboards, but they do not define the overarching types of keyboards as a whole. Therefore, the distinction between virtual and physical encapsulates the general types of keyboards used widely in contemporary technology.