The internal processor busdescribed in Sec. XX is connected to the external processor bus byasetof bus bufferslocated on themicroprocessorintegratedcircuit.
For the first quarter-century of the microprocessor's life, most integrated-circuit packages were fairly predictable hunks of ceramics, bought largely from one of four Japanese firms: Kyocera (its name is a combination of the words Kyoto and ceramics), NGK Spark Plug, Shinko Electronic Industries and Sumitomo Metal Electronics Devices.
For the first quarter-century of the microprocessor's life, most integrated-circuit packages were fairly predictable hunks of ceramics, largely bought from one of four Japanese firms: Kyocera (its name is a combination of the words Kyoto and ceramics), NGK Spark Plug, Shinko Electronic Industries and Sumitomo Metal Electronics Devices.
The integratedcircuit was invented to make smaller radios, the microprocessor to make smaller calculators, the Internet to speed communications between government agencies and universities.