The old password will be discarded and will not be recognized in subsequent logins. After running the password program, the shell takes over again and issues another prompt. Lisp was invented in the late 1950's and early 1960's at M.I.T. by John McCarthy. Scheme is a small, uniform dialect that is good for teaching because of its simplicity. In this course, we will use an implementation of Scheme called Chez Scheme .
Most programming languages require learning the syntax of many different kinds of statements.
Much of the work in learning Scheme is learning the names and effects of the system functions that form the core of the language. This course presents the system functions and covers other functions that are present in Common Lisp. Lisp is especially used for work in Artificial Intelligence. For example, CS 261, Artificial Intelligence , uses programming in LISP in its study of expert systems. The shell comes back and generates another prompt once Scheme has stopped.