Hello Guys, I am new to this forum and I dont know anything about photography. Actually My uncle was a professor at university and after his death I found about 7 FIDELITY CUT FILM HOLDERS 4x5, Horseman Optical Exposure Computer and Some other material (lenses). I have no idea what this all is about. I know its weird to ask but can somebody tell me is this material useful ? What can I do with this all ?

Please let me know I can upload the photos of the material as well.. there are some more things as well I even have no idea what is this all.