Polyglot (computing)
In computing, a polyglot is a computer program or script written in a valid form of multiple programming languages, which performs the same operations or output independent of the programming language used to compile or interpret it. Generally, polyglots are written in a combination of C (which allows redefinition of lexical tokens with a preprocessor) and a scripting language such as Lisp, Perl or sh. Polyglot markup is similar, but about markup language context. Polyglot persistence is similar, but about databases. The polyglot microservices allow developers to pick a programming language of their choice in order to build  products in more efficient ways. Industry professionals believe that, when the governance over which programming language to develop in are loosened, there are more opportunities for developer creativity and out-of-the-box problem solving. Methods. The two most commonly used techniques for constructing a polyglot program are to make liberal use of languages that use different characters for comments and to redefine various tokens as others in different languages. Often good use is made of syntax quirks. These are demonstrated in this public domain polyglot written in ANSI C, PHP and bash: Note the following: Some less-common languages  also offer possibilities to create Polyglot code. Here is a small sample, written simultaneously in SNOBOL4, Win32Forth, PureBasicv4.x, and REBOL: The term is sometimes applied to programs that are valid in more than one language, but do not strictly perform the same function in each. One use for this form is a file that runs as a DOS batch file, then re-runs itself in Perl: This allows creating Perl scripts that can be run on DOS systems with minimal effort.