What defines the term 'cursor' in computer usage?

The term 'cursor' in the context of computer usage specifically refers to a blinking line or icon that shows where the user's input will appear on the screen. It serves as a visual indicator that allows users to see the point of interaction within a text field or graphical interface. This element is essential for tasks like typing, as it helps users understand where their text will show up, guiding their actions on various applications. The cursor can take various forms, including an arrow, a text insertion point (caret), or other icons depending on the context and application being used.

The other options do not accurately describe a cursor's function or definition; rather, they pertain to unrelated hardware and components. For example, a printer component, black or colored ink, and a piece of hardware are distinct from the role a cursor plays in graphical user interfaces, making them irrelevant in this context.