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Machine code is complicated for people to read and write, so computer scientists use programming languages to write instructions instead. Most coders can write more than one, but no one understands them all. A set of instructioms is called a program. Each language, or code, is good for writing some types of programs. New languages are created all the time. The page lists just a few by the decade they were written. Each code has its own interpreter or complier, a program to translate that code into machine code that a computer can read.
