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2. Dots per inch - Wikipedia

   en.wikipedia.org/wiki/Dots_per_inch

   In printing, DPI (dots per inch) refers to the output resolution of a printer or imagesetter, and PPI (pixels per inch) refers to the input resolution of a photograph or image. DPI refers to the physical dot density of an image when it is reproduced as a real physical entity, for example printed onto paper. [4]

3. Lines per inch - Wikipedia

   en.wikipedia.org/wiki/Lines_per_inch

   Lines per inch (LPI) is a measurement of printing resolution. A line consists of halftones that is built up by physical ink dots made by the printer device to create different tones. Specifically LPI is a measure of how close together the lines in a halftone grid are. The quality of printer device or screen determines how high the LPI will be.

4. Laser printing - Wikipedia

   en.wikipedia.org/wiki/Laser_printing

   The laser printer was invented at Xerox PARC in the 1970s. Laser printers were introduced for the office and then home markets in subsequent years by IBM, Canon, Xerox, Apple, Hewlett-Packard and many others. Over the decades, quality and speed have increased as prices have decreased, and the once cutting-edge printing devices are now ubiquitous.

5. HP LaserJet 4000 series - Wikipedia

   en.wikipedia.org/wiki/HP_LaserJet_4000_series

   A HP LaserJet 4000n printer. The LaserJet 4000/4050 and their respective variants were the first printers released in the 4000 series. The LaserJet 4000 series printers print letter paper at 17 pages per minute, and can be set to print at 600 dpi or 1200 dpi, although when set to print at true 1200 dpi, the printer runs at reduced speed.

6. HP LaserJet 4 - Wikipedia

   en.wikipedia.org/wiki/HP_LaserJet_4

   The LaserJet 4 series had small printers in the range: the personal-use 4L and the small-business use 4P (and the Macintosh-compatible 4ML and 4MP). These printers both used the Canon PX engine, [7] which like the EX was new at the time of release. The 4L used the 300 DPI [8] PX engine, with the 4P using the upgraded 600 DPI [9] PX-II engine. [1]

7. Bitstream Charter - Wikipedia

   en.wikipedia.org/wiki/Bitstream_Charter

   Charter was originally optimized for printing on the low-resolution 300 dpi laser printers of the 1980s, and remains suitable for printing on both modern high-resolution laser printers and inexpensive lower resolution inkjet printers due to its strong, legible design. Its structure was optimised for low-memory computers and printers.