The website you're reading is about 10 years old, maybe older. Going through some of these older posts is a lot like cleaning out your attic. You come across a lot of dusty things, many of which you can't ever recall buying.
I'm keeping this site around but cleaning out some older posts. I've written a few piece on product development which I'll keep here for posterity. However, if you want to see my current writing on product management then visit my other site.