A printer is defined as a machine for printing text or pictures onto paper, especially one linked to a computer. Now surely you have at some point used, or at least seen a printer. They are widely used around the world in a multitude of spaces and for a large range of purposes.
A few places that you are almost guaranteed to find a printer include schools, offices, libraries, photography studios, design studios, and a million other locations. They can be used to make tangible printouts of almost anything, from essays and webpages to posters and photographs.
Printers take information from a device, such as a computer or a cell phone, and transfers the information onto any given paper type. Different types of printers have been created to tailor to specific industries. Some of the most popular printers are inkjet, laser, solid ink, and LED.
They each have slightly different qualities that make some of them better suited for the printing of high-quality photographic works versus being solely used in an office setting.
A copier is a machine that makes exact copies of something along the lines of a document, photograph, drawing, etc. The very first basic copy machine was released onto the market around 1959. Although they are not as popular as they once were as individual pieces of technology, copy machines can still be found being used in many places.
You could expect to see one in many of the same places that you would see a printer. Despite similar technology, they serve a much different purpose. For example, a professor may use a copy machine to make copies of a chapter in a book for a class homework assignment. This situation would call for a copy machine instead of a printer.
In the previously mentioned scenario, it can be assumed that the professor has a physical copy of the book needed. The copy machine would be used because the professor would need exact copies of the chapter in the book. In a slightly different scenario, maybe the professor wants to share an article that they found on a webpage with the class.
A printer would be used in this case because the information needed is on a computer. Technically speaking, the professor could make copies of the article with the printer. However, it would certainly not be the same as making the copies with the photocopy machine.