What is The Difference Between PostScript And Clean, Programming Languages

Both PostScript and Clean are Interpreted Programming Languages
What are Interpreted Programming Languages
An interpreted language is a programming language for which most of its implementations execute instructions directly, without previously compiling a program into machine-language instructions. The interpreter executes the program directly, translating each statement into a sequence of one or more subroutines already compiled into machine code. (Wikipedia)
Since PostScript and, are both Interpreted Programming Languages
Let us now look at the difference between the two:
What is PostScript Programming Language – A brief synopsis
It is used in the desktop publishing field and is known as a page description language. It is a dynamically typed stack-based programming language developed by John Warnock, an American computer scientist and Charles Geschke, a notable figure in the field of computer science. These developers went on to found the very well-known company, Adobe Systems.
What is Clean Programming Language – A brief synopsis
It is a purely functional programming language that supports portability across platforms, automatic garbage collection, multiple data structures and referential transparency, which means that a function with a given input will always give the same output.
Sources
A Complete List of Computer Programming Languages