But scheme's syntax is very rigid and simple. Ada uses Pascal like syntax. SQL stands for Sequential Query Languages. Which was used in querying information from databases. Sorry, this part is under construction .
Postscript is a stack based.
To play with postscript, you need to type up a postscript file. Unlike other languages, working with LaTeX often involves more steps. First, type up LaTeX in a .tex file. Then, compile it into a .div. And, then make it to postscript and print it or display it using program like Ghostview.