Complex sentence: The A1200 shipped with Commodore's third-generation Amiga chipset, the Advanced Graphics Architecture (AGA), which features improved graphical abilities in comparison to the earlier generations.
Split into simpler sentences: The A1200 shipped with Commodore's third-generation Amiga chipset, the Advanced Graphics Architecture (AGA). As the name implies, the AGA chipset features improved graphical abilities in comparison to the earlier generations.