I can suggest some reading material.
I suggest two books.
http://www.chick.net/wizards/wizards.html
Where Wizards Stay up Late, Katie Hafner, Is the real historical story of the early development of the Internet. It discusses many topics.
ISBN: 0-684-83267-4 * Simon & Schuster, 1996 * $13.00
You might find this book for less on Amazon.com
I liked this book, from a programmer and engineering perspective and it had some great pictures in it too. These are the starting dark days of computing. We are talking about memory built of iron cores wrapped with wire. Programs that had to be written with the least amount of code as possible. Even rewiring an entire computer for better uptime. Invention of TCP-IP, Networking Models, E-Mail, Protocols.
http://www.amazon.com/Accidental-Empire...ions-Foreign-Competition/dp/0887308554
Accidental Empires, Robert X Cringely is a classic and is full of topics. It is suppose to be a good book for looking at the business end of the Computer industry. It discusses Bill Gates, Microsoft, Who really invented the mouse pointing system, XEROX PARC, Invention of the Laser Printer, and the associated technologies, DOS, Intel, IBM. This book is worth reading for any computer major.
Worthy Inventions:
TCP-IP
The Mouse Pointing System
First Screen User System
Punch Cards
Floppy Disk and Hard Disk
Modem
Cable Internet
The first Chipset.
The Chipset was the most amazing hardware invention. Before the standardization of the chipset, every computer manufacturerer had to hard code machine code to access things like terminals, hard drives, floppy's, etc. When IBM started using the Chipset with their original IBM Desktops, this is an identifiable turning point for the Computer Industry. It is the chipset that allowed companies to mass produce desktop computer motherboards and computers. It is a big standardizing enfluence on the computer industry. It is still key to the computer hardware industry today.
Apple/Macintosh came out with a program that was similar to the Spreadsheet. This was available first only on their computers. This was another revolutionary development in the computer industry. It was a reason to buy a desktop computer. I am thinking it was called multi-calc or something like that.
Then add two more recent inventions:
IRC Chat and Chatrooms
IM Instant Messaging
Without Telephones there would have been no early computer networks, so you could argue the telephone was the best Computer Related Invention, because it introduced a way to route calls through Hardware. It could be said to be the first form of Networking.