Windows System requriements through time

I read this interesting article about how Microsofts OS products minimum system specs have changed during the years.
Just to make the changes more visible I drew some simple diagrams clearly showing that Vistas minimum system requirements are exponentially higher than Microsofts previous products.

A crude Lempel-Ziv encoder / decoder

The recent week I've created a simple Lempel-Ziv encoder.
Have a look at the code if you are interested!