Research: Secretarial Schools & Printing Shops

Well, January went right down the toilet with illness, but I've started off February right with some research and writing. I'm excited about my story I've begun to develop, and I'm confident my year-long journey to write a book will be successful.
This week, I'll share with you a bit about my initial research.
As so many authors do, I've dreamt up a completely doable story idea -- and set it a decade earlier than I'd even been born.
Why? I've always been in love with the history of the 1960s and 1970s. Work was hands-on for most people and many did not sit in front of a computer. Many office jobs required people to sit at desks and typewriters. However, their research often required standing to find physical files, books and search through card catalogs. Personally, it was one of my favorite things to do as a kid - search through card catalogs and then physically find a book or file on a shelf. But, I'm a huge nerd, and that's another story.
At any rate, I've long been fascinated by the whole secretarial pool concept. You know, the period in time when women were really entering the work force and one major way to climb the ladder was to enter secretarial work. Often, they did this by taking secretarial courses.

A glimpse of a secretarial class during the 1963-64 year at
Ryerson University in Toronto, Ontario, Canada.
(With permission from Ryerson University Library Archives)

So, my most recent research for a portion of my story is to find out the backgrounds of secretarial schools, which were later called business schools and basically offered courses teaching employable skills like typing, taking notes in shorthand and longhand, transcribing, and so on.
I'm pretty early on in my research and have a feeling it's going to take me a bit to find a decent amount of information about it. I also have a feeling I may need to make a few calls to historical societies.
My research has also led me to a nearly complete unknown - small business print shops. My character owns a print shop in the 1970s, printing items like flyers, business cards, pamphlets, newsletters and the like.
This idea brought me to the fact that I know nothing about the equipment she may have used, especially since she purchased the business from an older gentleman who'd owned it for 40 years.
Thankfully, I have a few ides of where I could find viable information on what machinery her shop may contain. And then, the tricky part will be making her role convincing as she usually works on her own equipment.
Excitement floods me when I think about this research, even though it's a minor portion of the project on which I'm working and most will only be peppered in throughout the story. Nonetheless, it is significant to know the background so I don't have incorrect references.
The rest of my month of research will be spent on my phone, calling historical societies and possibly colleges/universities. In between those calls, my fingers will be flying away creating more character background and hashing out plot details.