Scheme is a general-purpose programming language for computers. It is a high level language that supports operations on structured data like strings, lists, vectors, and numbers, as well as operations with more traditional data like numbers and characters. Although Scheme is often associated with symbolic applications, it has a rich set of data types that can be used to create complex control structures and a wide range of other data types. Scheme can be used to create text editors, optimize compilers and graphics packages, expert system, numerical applications, financial analysis programs, virtual reality systems, as well as operating systems, graphics, expert systems, operating systems, graphics, expert systems, operating systems, graphic packages, optimization systems, programming languages, and other types of applications. Because it is based only on a few syntactic forms, semantic concepts, and because most implementations are interactive, Scheme is easy to learn. It is difficult to fully understand Scheme.