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From Biolecture.org
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<li>what is a language? computer is basically operated according to arrangement of 1 and 0. so, it is hard for programmer to impart instruction(programm) directly. programming languages mediate languages of 0 and 1(<i>low-level language</i>), and real human language(<i>high-level language</i>) to make easy to programming. there are lots of languages having different levels according to its purpose and property, such as C, java, R, python, so on.</li>
<li>what is a computer? computer is programmable machine. It consists of hardware and software. hardwares are physical components of computer, which process instructions, receive and reperesent informations, and store what it did. software is program. it falls into two types - operating system and application software. Operating system controls hardware of computers to optimize its functionality. application software is so called program, making computer "work".</li>
<li>what is a grammer? grammer is rule making order of sentence of language. it indicates the position of key word, punctuation of sentence. programming languages also has grammer, which is especially called syntax. </li>
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