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<br> <br><p>Your computer's components work together through a bus. Learn about the PCI bus and PCI card, such as the one above. See more computer hardware pictures.</p><br><br> <br><br><br><br> <br><p>The power and speed of computer components has increased at a steady rate since desktop computers were first developed decades ago. Software makers create new applications capable of utilizing the latest advances in processor speed and hard drive capacity, while hardware makers rush to improve components and design new technologies to keep up with the demands of high-end software.</p><br><br> <br><br><br><br> <br><p>There's one element, however, that often escapes notice - the bus. Essentially, a bus is a channel or path between the components in a computer. Having a high-speed bus is as important as having a good transmission in a car. If you have a 700-horsepower engine combined with a cheap transmission, you can't get all that power to