What does a Portable Computer card provide?

A Portable Computer card, often referred to as PC Card or ExpressCard in modern terminology, is designed to expand a laptop's capabilities by allowing the addition of various hardware components. Choosing this option highlights the functionality of these cards in enhancing the laptop's features, such as providing additional RAM, a fax modem, or a hard disk drive.

This approach allows users to upgrade their systems efficiently and tailor their laptops to specific needs without having to replace the entire device. The versatility of Portable Computer cards means they can serve a variety of purposes, facilitating better connectivity and functionality depending on the card used.

Options suggesting a direct power supply, an interface for connecting multiple monitors, or enhancements to CPU processing speed do not accurately reflect the primary purpose of Portable Computer cards, which is to provide additional hardware capabilities rather than serving as a power source or improving processing speed directly.