6.001B: Procedures and Processes; Substitution Model

Description
In this particular lecture we will be discussing about waht is procedure ? waht are the processes and what is Substitution Model and how it works ?
Here we discussed about different types of expressions such as Numbers ,symbols etc..

" Hal Abelson and Gerald Jay Sussman, 6.001B: Procedures and Processes; Substitution Model, 6.001 Structure and Interpretation of Computer Programs, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (30-07-2011). License: Creative Commons BY-NC-SA: http://ocw.mit.edu/terms/#cc"