[1] In 1995, Bob Bishop and Rich Whicker, (both former Apple Computer Engineers) decided to create a new programming language that would be easy enough for everyone to understand and use.
SiMPLE is vaguely reminiscent of the AppleSoft BASIC programming language that exists on Apple II computers.
"Simple" is a generic term for three slightly different versions of the language: Micro-SiMPLE, Pro-SiMPLE, and Ultra-SiMPLE.
An example of a Micro-SiMPLE program listing (and a snapshot of the output display it generates) is shown in the figure below: (b) Pro-SiMPLE is the DOS-based version of SiMPLE requiring the use of only 23 keywords.
However, in an effort to provide as much backward compatibility as possible, both of those obsolete terms ("Ultra-SiMPLE" and "Pro-SiMPLE") are still accepted as being legitimate compiler directives.
Consequently the old SiMPLE's Command-line mode required dozens of commands (to support such capabilities as deleting source listings, renaming files, creating new project folders, etc.).
SiMPLE programs can be run in either "Drag & Drop" mode (intended primarily for beginning programmers), or in "Command-Line" mode (for more advanced programmers): (a) In "Drag & Drop" mode, the user simply creates a program source listing (a text document), and then runs that program by dragging the source listing document onto a special icon.
(b) In "Command-Line" mode, the user creates and runs programs by typing commands and listings into a DOS window.