Maintenance refers to the development of the software has been completed (analysis, design, coding and testing) work and delivery of future use, a number of software engineering software products performed activities. That is according to the situation of industry software design software running on the software appropriately modified to meet the new requirements, as well as error correction operation found. Writing software problem reports, software modifications report. A medium-sized software development phase if it takes time for one to two years, it is put into use in the future, its operating or working time may last five to ten years. Then its maintenance stage also running during this five to ten years. Iphone is running on a system that is developed by Apple office software design, like the OS than XP on the same computer, IOS is the iphone soul. Public IOS software design is well known, and now smart phones are very popular, people are impressed by its intelligence applications, while also developing intelligent software's 3G industry development seen as one of the most power, the most promising sectors . Iphone IOS was originally designed to be used on ipod touch, ipad and apple tv then gradually applied to products. That electronic software design, ios is all Apple mobile operating system, Apple ios is the world's most complete and ecological best mobile development platform. IOS software development jobs not only pay high, and excellent working environment, social status is high. System software design, abundance and Information Technology Center, Shuangyashan City software design provided by the Shenyang City HSBC and Information Technology Center. Shenyang City HSBC and Information Technology Center (www.4000010001.com) (www.tz1288.com) is Shenyang, IT project co-leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. In abundance and IT central leadership with the staff warmly welcome all inquiries negotiations to create abundance and IT center a better future.