Here is a network interface card and TAP cable for an Apple II, II+, or IIe system, made by Corvus Systems in the mid-1980s. This attached the Apple II to an Omninet network, which had a shared external 5.25\" full height hard drive. The cable attaches to the card using a 3-pin connector. The other end of the cable has an RJ45 connector with only one red and one black wire inside. Corvus Systems was the first to extend Apple\'s operating system for a hard drive. Their first drives in the early 1980s were 5MB or 10MB, and their largest were 126MB in 1987, when the company filed for bankruptcy. They made Omninet interface cards for IBM PCs, S100 bus CP/M systems, Tandy TRS-80 systems, Atari 800 as well as Apple II. I offer a 30 day return privilege and free USPS shipping to any U.S. zip code