existing computer system meaning in Chinese

现存计算机系统
现有计算机系统

Mr wong said that although the framework was primarily intended to be used by government bureaux and departments , the business community and members of the public however may wish to know something about it when they build or upgrade existing computer systems which may interact with government applications electronically
黄志光指出，虽然互用架构主要供政府决策局及部门采用，但是它亦为私营机构及市民在建立或提升可与政府系统互动的电脑系统时，提供所需的参考资料。