Twitter shares tumbled Friday after a brokerage analyst warned the popular messaging network was overvalued following a meteoric rise since its initial public offering in November.

Twitter shares closed down 12.99 percent at $63.79. But the stock has more than doubled from its offering price at $26 on November 7.

Taiwanese prosecutors on Friday indicted a chief designer and five employees at leading smartphone maker HTC for allegedly leaking crucial trade secrets to China and breach of trust.

Chien Chih-lin, vice president of product design, was charged with leaking information relating to "highly valuable" designs for a yet-to-be-launched smartphone interface to unidentified individuals in Beijing in an attempt to set up a joint new company in China, prosecutors said.

Mix blatant bigotry with poor spelling. Add a dash of ALL CAPS. Top it off with a violent threat. And there you have it: A recipe for the worst of online comments.

Blame anonymity, blame politicians, blame human nature. But a growing number of websites are reining in online commentary. Companies including Google and The Huffington Post are trying everything from deploying moderators to forcing people to use their real names. Some sites, such as Popular Science, are banning comments altogether.

Americans waited until the last minute to buy holiday gifts, but retailers weren't prepared for the spike.

Heavy spending in the final days of the mostly lackluster season sent sales up 3.5 percent between Nov. 1 and Tuesday, according to MasterCard Advisors SpendingPulse, which tracks payments but doesn't give dollar figures.

Amazon Thursday said it would give $20 gift cards and pay shipping costs for customers affected by problems at UPS and FedEx that delayed some Christmas package deliveries.

The Amazon pledge came after UPS in particular came under fire for late packages despite vows from retailers to meet a December 25 deadline.

Taiwanese authorities on Wednesday slapped a fine of Tw$20 million ($667,000) on U.S tech giant Apple for violating a fair trade law over .local iPhone pricing.

The Fair Trade Commission said an Apple unit in charge of Taiwan sales had interfered in the pricing and mobile phone payment rates of three local telecom service providers, despite selling them the distribution rights to the phones.

If you are on the road and want to watch live TV and recorded shows on your phone or tablet, there aren't many easy options.

Although services such as Hulu let you watch television shows over the Internet, new episodes aren't typically available until the day after they air. Your cable or satellite TV provider may offer apps for watching, but the channels offered vary from provider to provider, and trying to figure out what's available when or where can be frustrating.

Apple and China Mobile announced a long-anticipated agreement Monday to bring the iPhone to the world's biggest phone company.

The deal might help to boost iPhone sales in a market where Apple Inc. faces intense competition. The iPhone already is available in China through two smaller carriers but the latest deal links it with a bigger network and state-owned China Mobile Ltd.'s marketing power.

AT&T said Friday it would join rivals in the tech and telecom sector in publishing a "transparency report" about demands for information from law enforcement agencies.

The announcement came a day after a similar announcement from sector rival Verizon, which follow releases from big technology firms including Google, Apple and Microsoft, and intense scrutiny of these firms in light of revelations of wide-ranging U.S. government surveillance programs.

It's tough to shop for techies. They already own everything with a plug or rechargeable battery. But fear not, a slew of unique technology gifts have hit the market just in time for Christmas.

Here's a roundup of some of the season's most offbeat offerings. While these items may seem a bit wacky and bizarre, it's doubtful that the tech enthusiasts in your life own anything similar.