I learned about software in this chapter. software refers to a set of instructions that tells the computer what to do. Software is very important for computer. there are a lot of software in the computer like application software, system software, productivity software, word processing software, open source software, proprietary software, web-based applications, spreadsheet software, presentation software, database software, personal information manager software, wizard, template, integrated software, software suite, tax preparation software, financial planning software, multimedia software, image editing software, simulation programs, management software, drawing software, accounting software, web page authoring software, project management software, enterprise resource planning system, and shareware. application software is the software you use to do tasks at home, school, and work. you can do a multitude of things with application software, such as writing letters, sending e-mail, paying taxes, creating presentations. system software is includes software such as windows and Mac OS X, which help run the computer and coordinate instructions between application software and computer's hardware devices. Productivity software includes programs that enable you to perform various tasks required at home, school, and business. This category includes word processing, spreadsheet, presentation, database, and personal information manager program. Word processing is to create and edit documents such as research papers, letters, and resumes. Open source software is program code that is publicly available and has few restrictions. Web-based applications which was discussed in greater detail in computer. spreadsheet software is such as Microsoft Excel and OpenOfice.org Calc enables you to calculations and numerical analyses easily. Presentation software such as Microsoft PowerPoint, to create these types of dynamic slide shows. Database software such as Microsoft Access are powerful applications that allow you to store and organize data. Personal information manager(PIM)