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We know that computers can be used for work, study, entertainment, etc. In addition to the necessary computer hardware, software is also needed. Usually, we call a computer with only hardware but no software "bare metal", which cannot do any meaningful work. At present, software can be divided into two categories according to its use: system software and application software. System software is a program designed for computer systems to efficiently use and manage computer software and hardware resources and support the operation of application software. Such as operating systems, programming languages and language processing programs, network system software, system service programs, etc. Among them, Windows operating system is what we often use. Application software is a variety of programs that are user-oriented and written to solve practical problems. It can be written by users themselves or purchased. For example, office XP, Photoshop, Red Alert and so on, which we often use.Exception effect:? ? The rhythm philosophy method, with this method to cultivate their own habit of concentration, when the body adapts to a habit, do this thing becomes natural. In other words: scarce concentration can be cultivated through our own efforts. Once this concentration is formed, we will become the envy of our childhood.No.34 Zhang Xueying此剧讲述四个正处于七顚八起状态的年轻人在职场上奋斗，和与他们家人之间相处的故事。‘浊明外景，清明内景，夫子字清明，人送他‘清明书生雅号。