Oct. 21, 1988 - Has surgery for breast cancer after being diagnosed earlier in the year. She never releases the details of the surgery or any follow-up medical care.

1996 - Writes the majority opinion in a 5 to 4 decision to restrict affirmative action policies and voting districts that are created to boost political power of minorities. Shaw v. Reno

1999 - Writes the majority ruling opinion in the 5-4 sexual harassment ruling that public school districts that receive federal funds can be held liable when they are "deliberately indifferent" to the harassment of one student by another. Aurelia Davis v. Monroe County Bd. of Ed

2000 - Votes with the majority in a 5-4 decision that struck down state laws banning the medical procedure that critics call "partial-birth" abortion. Stenberg v. Carhart

December, 2000 - Votes in the majority to end the recount in Florida which leads the way to George W. Bush becoming President over Al Gore. O'Connor and Anthony M. Kennedy are the only two justices that did not write either a concurring or dissenting opinion in that case. Bush v. Gore

January 31, 2006 - Retires from the Supreme Court.

January 24, 2008 - Hears oral arguments in the 10th U.S. Circuit Court of Appeals, Oklahoma City, Oklahoma. (A retired Supreme Court justice has the option to sit on lower federal courts.)

2008 - Develops the website, OurCourts which later becomes iCivics, which is a free interactive web-based program for middle school students on the U.S. court system. It allows students to investigate and argue actual cases and to participate in realistic government simulations.

2009 - OurCourts becomes iCivics. The website has produced 16 video games addressing topics such as civic participation and foreign policy.

July 30, 2009 - Is awarded the 2009 Presidential Medal of Freedom by President Obama.

2010 - Advocates for the passage of a Nevada ballot measure ending elections for judges.