All the entries are typed on what looks to be a manual typewriter. I would say this goes back to the early to mid 1990s. Just as personal computers with word processors were making it into homes and small businesses.
Interesting that Trump's email address at the time was melaniakmelania@aol.com.
That's what I'm wondering, too.
Are the Clintons names in there?
And does it really mean anything besides being an address book?