2006 may well be remembered as a turning point for the IT industry. Computing's most famous figurehead announced he would step down, the internet finally started to grow up and a new era of desktop-computer processors promised to change the way we use PCs.

On top of that, a much-delayed Vista debuted amid speculation that it would be the last of the old-school, big-bang product launches. Plus, software giants announced support for Linux, and manufacturers switched chip allegiances while the open-source industry was thrown into turmoil.

But, aside from all the innovation, there was plenty of scandal too, with patent wars threatening one of the key enablers of the mobile workforce, and a snooping lawsuit turning all eyes on the world's top PC maker. Here, not necessarily in order of importance, are the PC Advisor's top 10 news stories of the year:

Google-YouTube: Convergence 2.0

Google's ability to afford the $1.65bn price tag for its acquisition of YouTube, announced in October, underscored its status as the internet's superstar revenue generator. The deal itself confirmed video's importance in the evolution of Web 2.0: the mashing together of user-generated content and multimedia applications. "Anybody who wasn't interested in YouTube was either asleep or not being honest," said said Jonathan Miller, who was deposed as AOL LLC chairman after the Google-YouTube deal. Competitors scrambled. Lycos launched a movie-streaming service mixing elements of social networking and online video, while movie studios and TV networks rushed to put video online. Legal issues between internet sites and content producers need to be worked out but one thing is for sure: convergence of video and the net has hit prime time.

When batteries attack

It was the biggest recall in the history of IT and consumer electronics. Sparked by reports that lithium-ion batteries could short circuit and catch fire, Dell in August recalled more than 4 million laptop batteries. The move was soon followed by manufacturers around the world including Apple, Fujitsu, Hitachi, Lenovo and Toshiba. More than 8 million batteries were recalled, leading to yet another black eye in an annus horribilis for Sony, the manufacturer of the faulty cells. The recall, startup costs for the delayed PlayStation 3 game console and poor PlayStation Portable sales pushed Sony's operations into the red.

HP spy scandal: board, and broad, implications

A board feud at Hewlett Packard hit the newspapers in September, leading to the resignation of Chairman Patricia Dunn. The board spat erupted over an investigation to see which board members leaked information - including arguments about the ouster of former chief executive officer Carly Fiorina - to the press. The company used "pretexting", where investigators pretend to be the people being investigated in order to access private information. Criminal charges were filed against Dunn, legal counsel Kevin Hunsaker and outside investigators. Users are unfazed: under Mark Hurd, chief executive and newly appointed chairman, HP has overtaken Dell as the leading PC maker and IBM as the biggest IT company in revenue terms. However, the scandal has broad implications. US Congress may make pretexting a federal crime.

Mac on Intel: chip industry realigns

Apple's January launch of the first Mac PCs running on Intel chips was historic. For decades, Apple's insistence on going its own way has been its strength, and also its weakness: the company has traded seamlessly designed products for market share... at least until the iPod came along. But Intel chips have breathed new life into the Mac line. A 30 percent jump in fiscal fourth-quarter Mac sales helped the company generate $546 million in profit and blow away analyst expectations. The company's profit margin is great: in its last reported quarters, Dell had more than 300 percent greater revenue than Apple, but only 24 percent greater profit. Meanwhile, in a blow to Intel, Dell in May announced that it would for the first time use chips from Intel rival AMD, in multiprocessor servers by the end of the year.

Microsoft cuts a deal with Novell: embrace and devour?

Microsoft's November deal with Linux distributor Novell created turmoil in the open-source world. Microsoft will offer sales and support for Novell's Suse Linux, work on interoperability and indemnify Suse users and developers from potential Microsoft lawsuits against copyright infringement. Industry insiders say that Microsoft is driving wedges into the open-source community, protecting only some users from legal reprisals. The open-source world had already been rocked in October, when Oracle's move to offer full support for Red Hat Linux had industry insiders worrying Red Hat's business model would suffer. Ultimately though, the software giants' embrace of Linux is a sign that no one can ignore open source. Microsoft chief executive Steve Ballmer said the impetus for the agreement came from customers. Though that's an old line, there's no doubt that open source has truly come of age.

Alcatel-Lucent: M&A mania grows

The merger of Alcatel and Lucent, announced in April, formed a $24bn networking giant and signalled trends in global mergers and acquisitions. The partnership was necessary to face down competition in growth areas of the business market - such as VoIP (voice over Internet Protocol) - while Chinese manufacturers put pressure on the west on the low end. 2006 is expected to yield 3,945 merger and acquisition deals, up from 3,455 in 2005 and the highest number ever, according to investment firm Innovation Advisors. Examples include AMD and ATI, Cisco and Scientific-Atlanta, Red Hat and JBoss, and EMC and RSA Security.

AOL search data release fuels privacy debate

AOL's July release of search log data on 658,000 subscribers, meant for research use, became a cause célèbre in the privacy-rights debate. Coming amid reports of corporate data leaks and phishing scams, it was yet another reminder of the general insecurity of data. The AOL records contained sensitive information such as Social Security numbers. In September three people sued the company in what their lawyers claimed was the first such lawsuit seeking national class-action status. They asked the court to instruct AOL not to store users' web-search records. But the request is not likely to be granted. Law-enforcement officials want service providers to retain user logs to aid investigations, and new data retention rules may be proposed. The ability of technology to store an ever-increasing amount of data will ensure continuing debate. Jurisdictional issues also come into play as the US and Europe clash over different privacy standards.

Patent wars singe BlackBerry

After the US Supreme Court declined in January to hear Research In Motion's appeal in its patent battle with NTP, industry watchers started sounding the death knell for RIM's BlackBerry. A $612.5m March agreement between the companies, however, ensures that RIM will never have to worry about NTP patent claims again. The case is emblematic of the disruptions caused by patent disputes, which often lead to near-automatic injunctions that prevent companies from selling products that allegedly infringe on patents - even before final patent rulings have been made. Many industry insiders found wisdom in the US Supreme Court's May ruling that courts need to look at multiple factors instead of immediately awarding injunctions. The court sided with eBay in a patent-infringement case brought by online auction company MercExchange. But patent wars continue: NTP sued Palm in November.

Vista delays... and launches

After numerous delays, Microsoft in November launched Windows Vista, along with Office 2007 and Exchange 2007. Although Microsoft chief executive Steve Ballmer called it "the biggest launch in our company's history", it didn't have that feel. Consumer versions of Vista and Office won't be available until the New Year, thus missed the holiday buying season. The products are important: among many other things, the level of interoperability among them is greater than ever before. But the launch may go down in history for another reason: it could be the last of the traditional big products launches. With more people tapping into hosted applications, Google experimenting with internet-based productivity applications and users receiving a steady stream of product updates over the web, big-bang launches may fade into the past.

Gates steps back... to plunge into philanthropy

Bill Gates' June announcement that he will step out of his daily role at Microsoft in July 2008 was a milestone that comes at a transition time. While he will remain chairman, Gates will focus on philanthropy. Microsoft was rarely if ever a fast mover, as for example Apple has been. But by combining technical acumen and business brilliance, Gates embodied the quintessentially American entrepreneurial knack of seizing a great idea and commercialising it beyond people's wildest dreams. His deal to provide the operating system for the IBM PC in 1981 fueled the personal-computing revolution. Over the next 25 years Gates led Microsoft to embrace the graphical interface and bring it to the masses, conquer the desktop market, and ultimately navigate the shoals of the internet era. Microsoft faces further battles in the internet age, against Google and other companies that will spring up. Meanwhile the Bill & Melinda Gates Foundation has assets of about $30bn. The world watches to see if Gates can revitalise philanthropy, as he did computing.