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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. GeoPort was a serial data system used on some models of the Apple Macintosh. GeoPort slightly modified the existing Mac serial port pins to allow the computer's internal sound hardware to emulate various devices such as modems and fax machines. GeoPort could be found on late-model m68k-based machines as well as many pre-USB Power Macintosh models. Some later Macintosh models also included an internal GeoPort known as the Communications Slot. Apple GeoPort technology is now obsolete, and modem support is typically offered through USB. Prior to the introduction of the Apple Macintosh, Apple engineers on the Apple Lisa team were working on the design of a local area networking system known as AppleNet , based on the Xerox XNS protocol stack running at 1 Mbit/s. There were also plans to offer AppleNet on the Apple II. Mac development had been ongoing for some time at this point, but the $500 price of AppleNet led Steve Jobs to refuse its inclusion on the low-cost machine.

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