Different programming languages work in different ways. So, programmers may create very different programs for different languages. For more information on those methods, please see individual language entries elsewhere.
Software is a mass noun for computer programs and data.
An algorithm is, in one sense, an abstracted program - to put it another way, a program is an algorithm made concrete. However, all but the smallest programs are most easily thought of as a collection of smaller algorithms combined in a unique way - as a house is built from components.
Creating a computer program consists of five major steps:
These 5 steps are collectively known as software engineering. Programming emphasizes steps 2, 3 and 4. Coding emphasizes step 3. The term coder, sometimes used as a synonym for programmer, can be demeaning, because it ignores the skills they use in tackling the other four steps.
The earliest known computer programmer was Ada Lovelace, daughter of Anabella and Lord Byron (the poet). Anabella gave her love of mathematics to Ada, who after meeting Charles Babbage, translated and expanded a description of his analytical engine. Even though Babbage never completed construction of any of his machines, the work that he and Ada did on them earned her the title of the world's first computer programmer. The Ada programming language is named for her. (To do: find name of first programmer to complete all 5 steps, including compiling and testing.)
Alan Turing is often considered the father of computer science, and by proxy, programming. He was responsible for helping design and program a computer to break the German ENIGMA code during World War Two.
See also event-driven programming, software, software documentation, programming language, computer science, software engineering, imperative programming, functional programming, cut and paste programming.