SAP scripts is a word processing tool of SAP which has the
following components: 
Standard text. It is like a standard normal documents.
Layout sets. - Layout set consists of the following
components: Windows and pages, Paragraph formats, Character
formats. Creating forms in the R/3 system. Every layout set
consists of Header, paragraph, and character string. ABAP/4
program.

Layout set and Print program and the layout set has windows
in it.

Components of scripts:
Layout sets, SAPScripts text, ABAP print program, symbols,
function module like open form, start form, write form, etc....
   
Layout sets of scripts are:
Header data, paragraph formats, charcter formats, windows,
page windows, pages.