Dedicated Computer Circuitry means that the circuit and breaker are intended for use with only your computer systems. Dedicated computer circuits ensure your computers are able to access the energy they need without overloading your system, losing power, blowing a fuse, or tripping a breaker.
If you are adding new heavy-duty computer equipment or simply adding additional outlets, you need new dedicated circuits. This is also essential to keep your computers running without something else tripping the breaker and causing your computers to go down. Also, think about whole home surge protectors to protect your computers in addition to everything in your home.