From Printing: ditto, mind your p's and q's, out of sorts

I am a big reader and I also love books and the bookmaking process. I came upon a book this past week called Printer’s Error: Irreverent Stories from Book History. The printing press and the democratization of knowledge through books changed the world.

One of the things in this book that I liked is how some common words and phrases come from the process of making books.

Here are a few I've found. I'm sure I'll add some more in the future.

I have used the word "ditto" and heard it used. Going back to schools 50 years ago, you might have recalled what we called a ditto machine that teachers used to make copies of handouts. In printing, ditto is shorthand to mean to repeat something that’s already been said. Its origin is the Italian word detto, the past participle of “to say.” 

The word came into wider usage with that early 20th-century duplicating machine which was produced by DITTO, Inc. And their simple logo was a single set of quotation marks " which is still used to mean "ditto" or same as above.

An 18th-century type case, with tools for typesetting

A phrase that I don't hear as much today as I did as a child is to "mind your p's and q's." When I was in seventh grade, I took a printing class and we actually learned to set type and use a printing press. (Yes, I must be old!)  This phrase when said by a teacher or parent meant to be on your best behavior or to pay close attention. But if my print shop teacher had said it in the printing context it would apply to setting type. In that process, you put each letter in backward, so that when the inked type is pressed into paper, the mirror image reads the right way forward. That meant that compositors had to be especially careful when it came to letters that look like mirror images of each other. In older type cases, each letter was kept in a segregated section to be picked out by the compositor setting the type. The lowercase p’s and q’s were nastily put right next to each other. If the placement had been different, maybe the phrases that would have emerged would have been “mind your b’s and d’s.” 

Related to those type cases, the capital letters were usually on the top rows and so were referred to as uppercase letters. 

Also from this typesetting area is the phrase "out of sorts." In common usage, it means to be feeling a bit off, perhaps unwell, or just grumpy. For printers and typesetting compositors it meant you were literally out of sorts. A sort is an individually cast piece of type. If you run out of out of type in the middle of a job, it would certainly make you feel out of sorts figuratively and literaaly.