Untitled timeline

Thousands of people use the Internet to collect photographs of people whose lives were affected by the Internet as part of a project known as 24 Hours in Cyberspace, an early experiment in collaborative photo blogging.

A man called Jorn Barger starts a daily log of interesting Web links published in reverse chronological order, calling it Robot Wisdom WebLog. The term "Weblog" is soon generalized by other online publishers to include any page with frequent short posts in reverse chronological order.

Open Diary becomes one of the first online tools to assist users in the publishing of online journals. It would later be followed by other journaling tools, including LiveJournal (1999), DiaryLand (1999), Pitas (1999), Blogger (1999), Xanga (2000), Movable Type (2001) and Wordpress (2003).

The development of RSS, or Really Simple Syndication. RSS makes it easier for people to subscribe to blog posts, as well as distribute them to other sites across the Internet, using tools such as the early news aggregator, Dave Winer's Radio UserLand.

Online journal author Peter Merholz takes Jorn Barger's word "weblog" and splits it into the phrase "We blog." Blog soon becomes shorthand for weblog.

Big-name bloggers begin to emerge, including Andrew Sullivan and Glenn Reynolds, aka Instapundit.

Bloggers focus their attention on comments made by Sen. Trent Lott (R-MS) at a birthday party for Sen. Strom Thurmond (R-SC) that appear to endorse segregation. After intense coverage in the blogosphere, the story spreads throughout the media, forcing Lott to resign his leadership position in the Senate.

The launch of Technorati, one of the first blog search engines, making it possible for people to track blog conversations on a continuous basis.

The creation of Audioblogger, which allowed users to record a voicemail over their phone and have it posted on their blog.

Public radio host Christopher Lydon publishes mp3 audio files on a Web site, using an RSS feed developed by Dave Winer so people could subscribe to them.

Iranian Vice President Mohammad Ali Abtahi launches his own blog, well before many U.S. politicians catch on to the idea.

The launch of Flickr, a photo-sharing community that helps popularize photo blogging.

Ben Hammersley, in an article for the UK Guardian newspaper, describes the technique used by Lydon, Winer and others as "podcasting."

Bloggers play a major role in covering the presidential campaign and promoting presidential candidates, particularly Democratic candidate Howard Dean. A number of them are credentialed to participate in the Democratic National Convention in Boston. Dan Rather resigns following pressure from conservative bloggers who documented inconsistencies in a CBS story about President George W. Bush's military service record.

Videographer Steve Garfield launches his video blog and declares 2004 "The Year of the Video Blog," more than a year before the birth of YouTube.

Rebecca MacKinnon and Ethan Zuckerman of Harvard's Berkman Center launch Global Voices, an international network of bloggers aggregating local and regional news stories around the world that aren't being covered by mainstream media.

Garrett M. Graff becomes the first blogger to receive credentials for the daily White House briefing.

Research report from the Pew Internet and American Life Project estimates that 12 million U.S. adults publish their own blogs.

The launch of Twitter, one of the first "micro-blogging" communities that allows user to publish and receive short posts via the Web, text messaging and instant messaging.

Technorati reports it is tracking more than 112 million blogs worldwide.