Multi-touch magic

The iPad is the latest and most striking example of Apple's use of multi-touch technology. True multi-touch capability was more concept than reality before the iPhone's debut in 2007. In less than three years, Apple has taken that technology and baked it into every one of its product lines. After the iPhone came multi-touch trackpads on Apple's laptops. Then, last fall, came the new magic mouse. And now it's being used in a full tablet. With each advance, Apple rolls out new ways to interact with devices.

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"You may have some posts you want to share with a wide audience, such as whom you voted for or how great the weather is today," Olaoluwa Okelola, a Facebook engineer, said in a blog post. "Other times, you may have more personal updates like your new phone number or an invitation to join you at your favorite restaurant for dinner that are meant for only close or nearby friends."

Okelola noted that the updated tool will ask users "Who do you want to tell?" after each response they make to "What's on your mind?" The answer will determine which Facebook friends get to see a user's posts, pictures and video.

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OK, Ubuntu is no Windows and Microsoft will say Windows is far more complicated. It has millions more lines of code. It is far more integrated with other products and has a larger ecosystem of hardware and software that it must ensure that it works with. Hence, slower release cycles.

However, Windows 7 was finished ages ago. Yes, we had the first code in in October and a beta in January - during which time very little in the build appears to have changed. We've had performance improvements and bug fixes, but Microsoft's been on the triage fast track, to the alarm of some early testers.

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"And if you have free software, you can make the business decision to give a thousand people in your company, all experiencing the same problem, you can make the business decision to fix that problem, send that fix back, and make it work. I'm not saying we can get rid of the whole $5 gap. But if we can get it down to $2, that means we save as a world economy $3 billion a day. That would almost pay for the war in Iraq. Thank you very much."

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Let's start by defining both cookies and how they are used to track your online behavior.

Cookies are small, plain-text files that reside on your computer and are managed by a web browser. If you have multiple web browsers installed on a single computer, each one maintains its own independent cache of cookies.

As web pages are downloaded to a computer, cookies typically come along for the ride. Likewise, as you make requests for new web pages, your web browser may upload a cookie as part of the web page request.