Actually, Macintoshes only have serial ports. They can also connect two computers together to allow file copying and sharing. Because they're so flexible, serial ports can also be used to connect other devices, such as testing or monitoring equipment. Monitor ports . These ports come in a variety of sizes.
Most computers now come with built-in monitor ports.
However, if you're using an older computer, you might find that your monitor is connected to a video card via an expansion slot plugged into the computer's motherboard . In terms of size, monitor ports fall somewhere between serial ports and parallel ports. On Macintosh computers, the monitor port is a 25-pin female designated by an icon resembling a computer screen. Universal Serial Bus ports . You'll find these mysterious, flat black ports on many new IBM-compatible computers.