Yes...and look just how far manuals have digressed?...

..over that same time peroid...
One of my early titles was
Their Finest Hour....The Battle of Britain by Lucas Arts.
The game though tons and tons of entertainment, is positively stongeage by today's standards.
BUT....that manual....

....I still have it in my reference library as it is a pretty comprehensive resource on the history of the BoB, as well as a detailed gamer's guide to playing the game.
...and come to think of it..I still have those 5 1/2 inch floppies somewhere too...