Apple III [SEP] operating system
an advanced operating system called Apple SOS, pronounced "apple sauce". Its ability to address resources by name allows the Apple III to be more scalable than the Apple II's addressing by physical location such as codice_1. Apple SOS allows the full capacity of a storage device to be used as a single volume, such as the Apple ProFile hard disk drive, and it supports a hierarchical file system. Some of the features and code base of Apple SOS were later adopted into the Apple II's ProDOS and GS/OS
Apple Pascal
Apple Pascal is an implementation of Pascal for the Apple II and Apple III computer series. It's based on UCSD Pascal
Just like other UCSD Pascal implementations, it ran on its own operating system ("Apple Pascal Operating System", a derivative of "UCSD p-System" with graphical extensions).
Originally released for the Apple II in August 1979, just after Apple DOS 3.2, Apple Pascal pioneered a number of features that would later be incorporated into DOS 3.3, as well as others