1. , , and : We couldn't pick just a couple of the Chrome OS stories that appeared on IDG news sites this week (and that we've continued to report and write), so we offer three landing pages that include Chrome OS news coverage, opinion pieces and analyses, as well as a detailed FAQ.

2. , and : Cyberattacks took down U.S. government Web sites and South Korean sites, among others, this week. While fingers pointed at North Korea as the likely source of the malevolent code, that was purely a guess and by week's end the origin of the attacks remained unknown.

3. : Social Security numbers are assigned based on mailing addresses, birth dates, and such, so that algorithms can be used to predict them, which means that the wealth of personal data that is easily available at, for instance, social-networking sites could make a whole lot of people vulnerable to identity theft.

4. : Microsoft knew about an Internet Explorer bug that has been widely exploited for more than a year, the company admitted, but went on to defend its security process amid the din of critics.

5. : At last! Google decided it would take the "beta" tag off of Gmail, Calendar, Docs and Talk to appease IT managers and CIOs who are vexed by that label.