<P> A system bus is a single computer bus that connects the major components of a computer system, combining the functions of a data bus to carry information, an address bus to determine where it should be sent, and a control bus to determine its operation . The technique was developed to reduce costs and improve modularity, and although popular in the 1970s and 1980s, more modern computers use a variety of separate buses adapted to more specific needs . </P> <P> Many early electronic computers were based on the First Draft of a Report on the EDVAC report published in 1945 . In what became known as the Von Neumann architecture, a central control unit and arithmetic logic unit (ALU, which he called the central arithmetic part) were combined with computer memory and input and output functions to form a stored program computer . The Report presented a general organization and theoretical model of the computer, however, not the implementation of that model . Soon designs integrated the control unit and ALU into what became known as the central processing unit (CPU). </P>

What is the function of buses in computer
find me the text answering this question