There are plenty of lists on the PCWorld website, click here.

News Events

1. #iranelection
2. Swine Flu
3. Gaza
4. Iran
5. Tehran
6. #swineflu
7. AIG
8. #uksnow
9. Earth Hour
10. #inaug09

Technology became a disruptive force in Iran this summer when protests broke out over the results of that country's presidential elections. Tech tools like twitter, cell phones, digital cameras, Flickr, YouTube and Facebook were all employed to get the word out and raise global awareness about the controversy. Since the protests, the actual impact of Twitter and other technologies on the protests have been called into question, but there's no doubt Iran was a hot topic online this year.
Technology

Google Wave was the hottest technology topic on Twitter for 2009. Google's collaborative work platform grabbed a large amount of interest when it was first announced, but since then enthusiasm for Wave has diminished. Apple and Microsoft got their fair share of tweets after launching the Snow Leopard and Windows 7 operating systems. And Palm's Pre was the only smartphone to make any of Twitter's top ten lists for 2009.

1. Google Wave
2. Snow Leopard
3. Tweetdeck
4. Windows 7
5. CES
6. Palm Pre
7. Google Latitude
8. #E3
9. #amazonfail
10. Macworld