CS 100 :: Fall 2026 :: In-Class Links

This is where Dave will be posting links to content used within the lectures and assignments.

A † indicates that it was not shown in class, but you may want to check it out if you're interested (you are not required to).

Lecture 05 (Thursday September 24, 2026)

• Spreadsheet for today
  cs100-in-class-excel-day-1.xlsx (right-click save as)

Lecture 04 (Tuesday September 22, 2026)

• † Babbage's Difference Engine (what a mechanical machine that uses 10 digits might look like)
  YouTube

Lecture 03 (Thursday September 17, 2026)

• † Visualizing WiFi
  Daily Mail Article
• Show My IP
  https://www.showmyip.com/
• HTTP Only website — you can put the IP address directly in your browser (include the http://)
  http://httpforever.com/
  http://146.190.62.39/
  
• TCP port numbers
  https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

Lecture 02 (Tuesday September 15, 2026)

• † Interstella 5555: The 5tory of the 5ecret 5tar 5ystem
  Wikipedia and YouTube
• † Visualizing WiFi
  Daily Mail Article
• How to write a postcard
  https://www.wikihow.com/Write-a-Postcard

Lecture 01 (Thursday September 10, 2026)

• Course Outline:
  https://outline.uwaterloo.ca/viewer/view/nbpcpb
• † Challenge Dave to a game on Board Game Arena (Dave's username: Dave Tompkins)
  boardgamearena.com
  (but only if you're keen -- there are no "bonus" / participation points)

Assignment Zero

• The secret word is: seahorse
• For a secret double bonus on Assingment Zero, check out this video.