上游充通大兽 1.2 Software Types SHANGHAI JIAO TONG UNIVERSITY User System Software It includes the Operating System and all the Application utilities that enable the computer to function. Application Software Operating system It includes programs that do real work for user. Hardware Open Source Software It is computer software whose source code is available under TM a license that permits users to use,change,and improve the open source software,and to redistribute it in modified or unmodified form 己0⑤年西 Proprietary Software(non-free software 豆A③®g It is software with restrictions on using,copying and modifying as enforced by the proprietor.Restrictions on use, 、尼马 modification and copying is achieved by either legal or technical means and sometimes both. Software EngineeringSoftware Engineering 1.2 Software Types System Software • It includes the Operating System and all the utilities that enable the computer to function. Application Software • It includes programs that do real work for user. Open Source Software • It is computer software whose source code is available under a license that permits users to use, change, and improve the software, and to redistribute it in modified or unmodified form Proprietary Software (non-free software ) • It is software with restrictions on using, copying and modifying as enforced by the proprietor. Restrictions on use, modification and copying is achieved by either legal or technical means and sometimes both