Hi. I've posted some of the main "design" developments for sections 1-6 of our textbook. For your 150-word comment, you may pick any one of the seven posts below. Let's emphasize historic design aspects, which is our main pursuit here. In addition to your main comment, you may add comments as responses to other comments (discussions are always a plus!). If necessary, I may interject and make a suggestion here and there. Please, don't sign in with an alias. Remember, you have until next Wednesday night to input your comments. Good luck!