SUPPLEMENTAL to ANDREW's ANSWER:
At one time (and on the scale of my life it wasn't very long ago) a direction like "Scan it and make it into a .pdf" would have made sense, because that really was what people did: first, they launched one piece of software from their desktop computer which saved the output off to some default image format; and after that they launched a different piece of software to embed the image in a .pdf.
Today, however, we no longer do it that way. Typically we don't launch any software at all from an external system: the scanner itself (or the smartphone, or whatever) is equipped with the software, and all the user does is plug in a thumb drive and touch a button that instructs the scanner to write its output to a .pdf on the drive. For the user it's not two actions but one: "scan the document into a .pdf".