What distinguishes a Notebook Computer from a Desktop Computer?

The distinguishing feature of a Notebook Computer is its design for portability. Notebook computers, also known as laptops, are engineered to be lightweight and compact, making them easy to carry and use in various locations. This is a fundamental aspect of their design, allowing users to work, study, or enjoy entertainment on the go without being restricted to a specific location.

In contrast, desktop computers are typically larger, stationary setups that consist of multiple components, such as a separate monitor, keyboard, and CPU. While desktops often provide more power and higher performance, they lack the mobility of notebooks, which are built for users who need to transport their computer easily.

The other options provided do not accurately characterize notebook computers. While modern notebooks can run both applications installed locally and web applications, they are not limited to just running web applications. Additionally, notebooks are fully capable of storing files, often offering considerable storage options comparable to desktop systems. Thus, the defining aspect is indeed the portability factor of notebook computers.