It's just going to be a one-way street now: LinkedIn status updates will feed to Twitter but not vice versa.

While the computer industry in the 1990s thrived as corporations re-engineered business processes to incorporate IT, this decade has seen technology truly become part of mainstream culture and commerce via the Internet and ever-cheaper and smaller computing devices. Yes, the Internet revolution began in the '90s, but it was not until this decade that 14-year-olds raced ahead of professionals in figuring out how to tap social networks with hundreds, and sometimes thousands, of contacts. Here, in not-quite chronological order, are the top technology stories of the decade, selected by the IDG News Service for their singular impact on the industry as well as their emblematic status as examples of the trends that shaped the course of IT.