A 5 part series

Hi, This project would be suited for computer science students (better if existing student). I need a series in 5 parts, each part being approx 1500 words. The topic has to be a technical computer science topic, and I am open to suggestions. You can go for any algorithm (like compression, AI, cryptography etc) or networking or anything that you consider your strong point. The first part has to be basics of the topic which a bit techy person can understand. In subsequent parts, you can increase the technicalities. I would appreciate if at least one part is devoted entirely to the application and demonstration of the topic (sample devices, code etc). Please do NOT copy wikipedia or any source in the internet. If you use something as a reference, do mention it along with the articles. Depending on the article's content and writing style, I am open to more work in future.