He is introduced in the first page of Stave one.
Bella is introduced on the very first page, since she narrates the book.
Page 70 and 71
Literature. Didn't you read the first page?
It's on the first page of the book, in fact it's the very first sentence.
Chapter 11... on the first page
Dylan is formaly introduced on page 34, chapter 10.
It is on page 93
On the first page, the reader of The Outsiders is introduced to the jet set. The term is used to differentiate the Socials from the Greasers in the book.
I assume you mean "When was the first operating system introduced?" Seems to be in the 1950s. See the link below for a very detailed page.