Final answer:
The name of the type of screw that is shown as a square in a circle is called a Robertson screw. The Robertson screw, also known as a square drive screw, was invented by Canadian salesman Peter Lymburner Robertson. It features a square-shaped recess in the head of the screw that fits with a corresponding square driver.
Step-by-step explanation:
The type of screw that is shown as a square in a circle is called a Robertson screw. The Robertson screw, also known as a square drive screw, was invented by Canadian salesman Peter Lymburner Robertson. It features a square-shaped recess in the head of the screw that fits with a corresponding square driver, providing better torque and reducing the likelihood of stripping the head compared to other screw types.