Initially the engineers had envisioned using the SCC to support a packet-based protocol known as "AppleBus". AppleBus would allow peripheral devices to be plugged into a daisy-chain configuration in a manner surprisingly similar to the modern Universal Serial Bus. However, as development continued, Apple's networking project, AppleNet, was being canceled due to high costs and a rapidly changing marketplace. Team members working on AppleBus quickly shifted gears, producing the LocalTalk system running on the SCC ports rather than AppleNet's plug-in expansion card.