Summary Box: Cray replaces IBM on supercomputer

NEW PARTNER: Cray Inc. will take over construction of the stalled $300 million Blue Waters supercomputer project at the University of Illinois. IBM Corp. had pulled out, citing cost and technical concerns.

WHAT IT WILL DO: The supercomputer will be used for a range of projects, including the study of how tornadoes are formed and how viruses invade cells.

TIMETABLE: Cray expects to have the computer online next year. That would keep the project on track to finish on time. Cray says cost and financing will stay essentially the same, with the bulk coming from the National Science Foundation.