The first mechanical computers made were designed to complete a specific task. That was until the 1940's when Von Neumann and his collegues introduced an architecture that was created to where computers can perform and execute many different types of tasks at the same time. Von Neumann's architecture is divided into different parts. The input device, output device, auxiliary storage device, main memory and the central processing unit. (CPU) which includes the control unit, arithmetic logic unit and the registers. Today most computers are still based off of Von Neumann's architecture and are also known as Von Neumann machines. The Von Neumann machine operates off a fetch execute cycle which is a five step where the CPU fetches an instruction from the memory and executes it. In the first step, the control unit uses the address in the program counter to fetch an instruction from the main memory. Next the instruction is decoded to determine if any data is needed to complete the execution. In the third step, all the data that is required is retrieved from the memory and placed in the registers. By using the data in the registers, the instruction is then executed by the arithmetic logic unit only if necessary. The instruction is then performed by the required input or output operations. Von Neumann's architecture is important to us especially today because we are able to use one device to perform multiple tasks instead of having to use multiple devices to complete one task. In order to complete these multiple tasks on one device, Von Neumann architecture uses a system bus to transfer information back and forth from the memory to the processor and then to the input and output devices. The system bus is often seperated into two or more busses. One for data and the other for instruction. This helps the computer from slowing down. The system bus is also known as frontside