What is a Program ? A program is a set of instructions written in a programming language to perform a particular function or a task using the computer. Many programs combine together to form a software. What is a Software ? Software is a collection of programs or instructions that enable a user to interact with the computer or have the computer perform specific tasks for them. Computer cannot operate without a software. e.g. :- Internet browser - To browse internet. Word Processing - To type a letter. Windows operating system - To operate. A computer programmer or several computer programmers write the instructions using a programming language that tell programmers how to work. Once the coding of these programs are completed, they are compiled into a language that the computer can understand, which is called ‘machine readable’ language. The most common programming language used for developing (coding) software are C, C++, Java, C#. Classification to Software. Syste...