Robert Comsol wrote:
"I quoted word by word which makes it abundantly clear that to fabricate the conclusion that Khan is ONLY reading the technical manual of the Enterprise is not only totally conjectural but wrong."
Of course it's conjectural because nothing else is said about it in the episode but the conclusion it was about Constitution class starships is logical. He was reading up on the technical manual of Enterprise systems so he could frickin' take over the ship! Why in the heck would he want to study a ships systems that were of no use to him and that he may never see? There was a point to his research which was to learn everything he could about the Enterprise and use that information as he needed to. This man was a leader and conqueror; he was not merely interested in studying the technology of the era. His research had immediate purpose.