«Morgue, Cortland Programmer’s Workshop». byteworks.us. Consultado el 3 de agosto de 2016. «...Apple decided to use a 16 bit version of ORCA/M as the standard development environment for the new machine, code named Cortland. On July 21, 1986, the last version of this environment that was still called Cortland Programmer’s Workshop was delivered to Apple for shipment to the developer community. Later versions were called Apple Programmer’s Workshop, or just APW...»
Arnett, Nick (19 de septiembre de 1988). «Apple Unveils IIGS OS, Speedier Apple IIc Model». InfoWorld (IDG) 10 (38): 39. ISSN0199-6649. Consultado el 3 de agosto de 2016. «...Apple Computer last week introduced a new operating system for the Apple IIGS,.....The new GS/OS operating system for the Apple IIGS has an enhanced, more Mac-like Finder and speeds up booting......includes support for large storage devices, up to 4 gigabytes...GS/OS runs programs written for the earlier operating systems, Pro-Dos 16 and Pro-Dos 8...»
Westerfield, Mike (2013). «About the Author». Building IPhone and IPad Electronic Projects: Real-World Arduino, Sensor, and Bluetooth Low Energy Apps in TechBASIC. Beijing: O'Reilly Media. p. 317. ISBN1449363482. Consultado el 3 de agosto de 2016. «...Mike Westerfield...Two years later he finished ORCA/M, which went on to become Apple Programmer's Workshop, the Apple development environment for the Apple IIGS...»
Arnett, Nick (19 de septiembre de 1988). «Apple Unveils IIGS OS, Speedier Apple IIc Model». InfoWorld (IDG) 10 (38): 39. ISSN0199-6649. Consultado el 3 de agosto de 2016. «...Apple Computer last week introduced a new operating system for the Apple IIGS,.....The new GS/OS operating system for the Apple IIGS has an enhanced, more Mac-like Finder and speeds up booting......includes support for large storage devices, up to 4 gigabytes...GS/OS runs programs written for the earlier operating systems, Pro-Dos 16 and Pro-Dos 8...»
