Complex sentence: The Hunk_Overlay type for Amiga executables was one of the standard Hunk-Types created by Commodore, and it is intended to solve the problem of small amount of RAM which afflicted early low-end Amiga models.
Split into simpler sentences: The Hunk_Overlay type for Amiga executables was one of the standard Hunk Types created by Commodore. It was intended to solve the common problem of having a very small amount of RAM, which afflicted early low-end Amiga models.