Since the early beginning of computer history, one has needed programming languages as an intermediate representation between algorithms description and machine-readable instructions. In broad outline, running an algorithm on a computer requires the following steps: (1-software development, implementation) the developer transcribes the algorithm into a source file containing programming language instructions, (2-compilation) a compiler translates these programming language instructions into machine code and performs adaptations to the original code for optimized fit to the target execution support, and (3-execution) the processor reads and executes the machine instructions, loads the input data and produces the data results.