Donald E. Knuth introduced the concept of literate programming, a method that treats programs as literary works, emphasizing clarity and documentation. The WEB system, developed at Stanford University, embodies this philosophy by combining a document formatting language (TeX) and a programming language (PASCAL). WEB allows programmers to write programs as explanatory texts, which can then be processed to generate both executable code and well-documented text. This dual-purpose approach ensures that the program and its documentation are consistent and mutually reinforcing. The WEB system is designed to be bilingual, integrating a document formatting language with a programming language. This combination enhances the power of both languages, allowing for more expressive and maintainable code. The system includes tools like WEAVE and TANGLE, which process WEB files to generate documentation and executable code, respectively. WEAVE produces a formatted document, while TANGLE generates a machine-executable program. A detailed example of a WEB program is provided, illustrating how the system can be used to write a program that generates prime numbers. The program is structured as a series of sections, each containing both explanatory text and code. This structure allows for clear documentation and easy maintenance. The example demonstrates how WEB can be used to produce both a well-documented program and an executable version of the same program. The WEB system also includes features for handling various programming tasks, such as macro definitions, formatting, and portability. These features make WEB a versatile tool for writing and documenting software. The system is designed to be portable across different machines and operating systems, which is a significant advantage in the field of software development. In conclusion, literate programming, as exemplified by the WEB system, represents a significant advancement in programming methodology. By treating programs as literary works, it enhances clarity, maintainability, and documentation, leading to more reliable and understandable software. The WEB system provides a practical implementation of this philosophy, offering a powerful tool for software development.Donald E. Knuth introduced the concept of literate programming, a method that treats programs as literary works, emphasizing clarity and documentation. The WEB system, developed at Stanford University, embodies this philosophy by combining a document formatting language (TeX) and a programming language (PASCAL). WEB allows programmers to write programs as explanatory texts, which can then be processed to generate both executable code and well-documented text. This dual-purpose approach ensures that the program and its documentation are consistent and mutually reinforcing. The WEB system is designed to be bilingual, integrating a document formatting language with a programming language. This combination enhances the power of both languages, allowing for more expressive and maintainable code. The system includes tools like WEAVE and TANGLE, which process WEB files to generate documentation and executable code, respectively. WEAVE produces a formatted document, while TANGLE generates a machine-executable program. A detailed example of a WEB program is provided, illustrating how the system can be used to write a program that generates prime numbers. The program is structured as a series of sections, each containing both explanatory text and code. This structure allows for clear documentation and easy maintenance. The example demonstrates how WEB can be used to produce both a well-documented program and an executable version of the same program. The WEB system also includes features for handling various programming tasks, such as macro definitions, formatting, and portability. These features make WEB a versatile tool for writing and documenting software. The system is designed to be portable across different machines and operating systems, which is a significant advantage in the field of software development. In conclusion, literate programming, as exemplified by the WEB system, represents a significant advancement in programming methodology. By treating programs as literary works, it enhances clarity, maintainability, and documentation, leading to more reliable and understandable software. The WEB system provides a practical implementation of this philosophy, offering a powerful tool for software development.