How does a computer's parallel port work?

Computers send data through parallel ports, serial ports, or network connections. How does a computer's parallel port work? And how can I design things to attach to a parallel port?

How IDE Controllers Work

The Integrated Drive Electronics interface is the most popular way to connect a hard drive to a PC. Find out where IDE came from and how it works today.

How PCI Express Works

PCI slots are an integral part of a computer's architecture, but they have some shortcomings. Now there's a protocol that provides more bandwidth and is compatible with existing operating systems. Find out about PCI Express.

How PCI Works

Essentially, a bus is a channel or path between the components in a computer. And having a high-speed bus is as important as having a good transmission in a car.

How SCSI Works

A computer is full of buses -- highways that take information and power from one place to another. While USB is good when utilizing small electronic devices, sometimes you need something bigger. That's where SCSI comes in.

How Serial Ports Work

The serial port was an integral part of most computers for more than 20 years, but new computers usually have USB connections instead. Serial ports are still used for most modems, as well as a few other electronic devices.

How USB Ports Work

USB, or universal serial bus, is the preferred connection method for almost all current electronics. Find out how this type of port can support a wide variety of devices and learn why USB is so versatile.