Interesting collection of current and older corporate brand guidelines including the Apple Web Design Guide from December 1996:
Keep Pages Short
Short pages are better than long pages. People are more likely to read a short passage of text than a long one, especially if they have to make an extra effort, like scrolling, to do it. Onscreen text is more difficult and time consuming to read than hardcopy text, which makes people even
less likely to thoroughly read long sections of text on a computer.