Complex sentence: It receives the majority of its operating and research budget from DARPA, the National Science Foundation, NASA, and private corporations, including AT&T, Cisco, Hewlett-Packard, Intel, Lucent, Microsoft, NVIDIA and Sun Microsystems.
Split into simpler sentences: It receives the majority of its operating and research budget from DARPA, the National Science Foundation, NASA, and from private corporations. Corporate funders have included AT&T, Cisco, Hewlett-Packard, Intel, Lucent, Microsoft, NVIDIA, and Sun Microsystems.