It is important to note which operating systems are supported, and whether or not these devices are HP compatible . Dot-matrix printers use an array of pins to strike an inked printer ribbon that produces images on paper. These printers use either 9 or 24 pins and create each page as a raster image. An increase in pins yields higher quality. These printers are nearly obsolete due to the advent of inkjet printers.
Many manufacturers specify the duty load for a one month period.
Care should be taken to ensure that the printer you choose can handle the number of pages needed. Each command is prefixed by a special code to signify that the following characters are a command, and not data to be printed. Escape code languages do not offer the flexibility of page description languages , and are suited to simple documents such as letters, database printouts, and documents that contain simple graphics. Escape code languages do not offer sophisticated typographic features, so while they may be able to use a range of different fonts, most escape code languages can only print text in a limited number of sizes, and cannot handle special effects such as printing text at an angle or on a curved line. This makes them capable of emulating an HP printer.