On personal computers, there are five most commonly used operating systems: DOS, Windows, Unix/Xenix, and OS/2. DOS System-In the 17 years since its inception in 1981, DOS has undergone 7 major version upgrades, from version 1.0 to version 7.0 now, continuously improving and perfecting. Windows System-Windows is the first generation of window visual interface published by Microsoft in November 1985, which makes PC enter the so-called GUI (Graphical User Interface) stage. Unix system. Unix systems were initially used on small and medium-sized computers. Unix is a multi-user system, which generally requires more than 8M of memory and a large capacity of hard disk. Linux system-Linux is the largest free software in the world at present. It is an operating system with functions comparable to UNIX and Windows and has complete network functions.爱情小说就是不讲人话，不干人事。影片讲述主人公阿乐与好友大师兄、云涛三个好友整天吃喝玩乐，美女相伴，阿乐因为生活的债务而被人威胁，一时想不开有了轻生的念头，这时恰巧云涛打来电话相约去海上游玩，大师兄带着老婆姗姐，云涛带着新结识的女友天晴，天晴带着她的闺蜜美琪，天晴想要把还是单身的美琪介绍给还是单身的阿乐认识，这趟旅行同对于阿乐来说非同寻常，有着特殊的意义。也许是天意弄人。据悉，《境界线上的地平线》的BDBOX除了收录第1季，第2基本的全26话电视动画外，还将收录已经发售的BD初回限定版的特典。此外，新收录特典有川上稔新写的小说和特典乐曲、特制小册子（52P）、角色设定藤井智之新绘的包装以及完全新作特典动画。这是时隔6年《境界线上的地平线》才推出的新作动画，算是比较有吸引力的特典。八十年代，歌女朱莎娇(米雪饰)独自带着孪生女儿在流浮山生活，可惜一对女儿长大后却为爱情决裂。莎华离家出走，莎莎难产逝世，莎娇从此肩负照顾外孙女君好的重任，以及收养了哑巴小男孩文初。时光荏苒，君好(何依婷饰)生父祝展辉(海俊杰饰)的出现，令莎娇、莎华(姚嘉妮饰)和君好这三代关系，再次陷入爱恨纠缠之中。文初(胡鸿钧饰)、君好与年青有为的司徒礼信(罗天宇饰)因缘分结为好友，渐渐让兄妹间泛起超乎亲情之爱，更牵进三角虐恋，无法抉择，唯有以牺牲和无私奉献，成就挚爱的幸福...
