1. The document discusses the differences between applications (apps) and system software, as well as hardware, firmware, and software. 2. System software manages system resources and serves as a platform to run application software, while application software performs specific functions. System software runs automatically at startup/shutdown, while application software runs on user request. 3. The document also compares hardware, firmware, and software. Hardware are physical computer components, software are programs that can be updated, and firmware is semi-permanent software that may require more skill to update.