I don't want to sound rude, but the first step I'd recommend would be to post pictures on a forum in such way that they don't take up too much space. I already have 1920x1200 screen and I had to scroll quite a bit to even see what's on the image.
Next, I'd recommend that you post in writing exactly what you have, preferably with a better description than just "books". This will allow people who do have experience in the field to more easily comment on what you have. Remember, you're asking for help, so you should make it as easy as possible for others to provide it.
A step further would be to take clear, focused photographs of all the connectors the computers have and post them. You may even get lucky if you try Google's reverse image search. It may provide you with some names or keywords on how to look further. More experienced members may know directly what standards are used and might provide help. Remember that most of the picture are should show what you want to present to others. It's not easy to make a good photo, so try practicing. It helps!
Also, remember Wikipedia! It can be a really good friend in such cases. I even found ROM dumps for a retro computer I was investigating few years ago on it.
Finally, I wish you the best of luck with your retro-computing adventures!