Q.Explain in brief any one freedom offered by Open Source Software. Write one example for each of the following :

Software Classification Types

Think of software like the roles people play in an office. A receptionist, an accountant, and a plumber all do very different jobs, but they all work in the same building. Software is the same: it's the set of instructions that tells a computer what to do, and different software does different kinds of work.

The most fundamental way to classify software is into two broad families: system software and application software. Everything else is a sub-type of one of these.

System Software — The Manager

System software is the invisible manager that runs the computer itself. It doesn't help you write a letter or play a game; it makes sure the hardware (the screen, keyboard, memory, processor) works correctly and that other programs can run. Without system software, your computer is just a pile of metal and plastic.

The most important example is the operating system — Windows, macOS, Linux, Android, iOS. The operating system is the boss. It allocates memory, manages files, handles input from the keyboard and mouse, and decides which application gets to use the processor at any moment.

Other system software includes:

• Device drivers — small programs that let the operating system talk to specific hardware (like a printer or graphics card)
• Utility programs — tools that maintain the system, such as antivirus software, disk cleaners, and backup tools
• Language translators — compilers and interpreters that convert human-written code into machine language

Application Software — The Worker

Application software is what you do with the computer. These are programs designed to help you perform specific tasks. If system software is the manager, application software is the worker who actually produces something.

Application software is further classified by purpose:

Productivity software — tools for creating and managing work. Word processors (Microsoft Word), spreadsheets (Excel), presentation software (PowerPoint), and database management systems fall here.

Business software — specialised tools for running an organisation. Accounting software (Tally, QuickBooks), enterprise resource planning (ERP) systems, customer relationship management (CRM) software.

Educational software — programs designed for learning. Digital encyclopedias, language-learning apps, interactive tutorials.

Entertainment software — games, media players, streaming apps.

Communication software — email clients, web browsers, messaging apps, video conferencing tools. …