It is true that it has many varieties and uses different techniques and materials (paint, paper).The main division is cold printing, where the paint is fixed by soaking into paper.
While the 'hot' offset where the printed paper web passes through the drying tunnel. The classic offset (water) is associated with the use of water rollers and hydrophilic and hydrophobic surfaces, however, this method is already abandoned due to the difficulty in obtaining a good balance of water and oil paint. The successor of this method is anhydrous offset printing where silicone molds are used instead of water.
After all, it's hard for an enterprise that does not have its own leaflets or posters.
This does not mean that it is a failing industry, there is still a lot of potential in the printing companies and those that provide them with materials.Now, the printing services are so accessible that even one-man companies can easily afford to regularly buy printed materials.
In computing, a printer is a peripheral device which makes a persistent human-readable representation of graphics or text on paper.
The first computer printer designed was a mechanically driven apparatus by Charles Babbage for his difference engine in the 19th century; however, his mechanical printer design was not built until 2000.The first electronic printer was the EP-101, invented by Japanese company Epson and released in 1968.
The first commercial printers generally used mechanisms from electric typewriters and Teletype machines.The demand for higher speed led to the development of new systems specifically for computer use.
The plotter was used for those requiring high quality line art like blueprints.Źródło: https://en.wikipedia.org/wiki/Printer_(computing).