Older hardware and software specification for communicating with expansion devices. NuBus "slots" were found inside the first Power Macs and older Macs that used Motorola 680x0 processors. NuBus has now been replaced by PCI.
hardware: A set of rules developed by Apple for expansion cards that plug into slots inside the computer. NuBus cards are generally more intelligent and speedier that earlier expansion cards. They are used by most Macs with slots, but second-generation PowerMacs will substitute the PCI bus standard.
n. A high-performance expansion bus used in Apple Macintosh computers, offering high bandwidth and multiple bus controllers. Invented at the Massachusetts Institute of Technology (MIT), NuBus was eventually licensed to Texas Instruments and other companies. See also bus.
A bus architecture that allowed a variety of components to be added to older Macintosh models by installing cards into expansion slots such as video capture cards and networking. NuBus is a different bus architecture than the newer PCI bus and the boards are not interchangeable.