This document defines and summarizes several key technology terms and concepts:
1. A blog is a web-based publication consisting of periodic articles in reverse chronological order, typically maintained with automated software.
2. A podcast is a method of publishing audio broadcasts over the internet which allows users to subscribe to new files, usually MP3s.
3. Open source describes practices that promote access to source materials like code to allow modification and sharing. Well-known projects include Linux, Apache, and Firefox.