Also things like FTP and telnet had many applications, too. My grandfather is an electrical engineer and he talked about how cool it was that the company he worked for got online in the 1980s because it allowed them to get things like Fortran compiler updates or numerical libraries without having to wait for them to be shipped on floppies. My uncle used online services for his food industry business, stock trading, etc. then too.

In early 1987 the number of hosts passes 10,000 [1] Space Quest - The Sarien Encounter was released in October 1986 [2] Only in 1989 Australia, Germany, Israel, Italy, Japan, Mexico, Netherlands, New Zealand and the United Kingdom join the Internet.

[1] https://www.computerhistory.org/internethistory/1980s/ [2] https://en.wikipedia.org/wiki/Space_Quest_I

Also one year later IRC was invented.

Killer app if ever there was one.