Key differences between the original Arpanet design and the current version of the Internet

In 6 to 8 pages – chose one from the following themes:

What are some of the key differences between the original Arpanet design and the current version of the Internet in terms of network technologies?
How has marketing communication efforts transformed key perceptions of computer and network technologies from the early 1980s to today?
Apple vs. Microsoft – How have these two champion rivals remained a dominant fixture in the lives of consumers worldwide for the better portion of 3 decades from the lens of network technologies?