If you pay attention, you will see that after the printer name code, there are often the letters dn, n, d, dw or dne. For example, HP printers have the following lines: HP M404n; HP M404dn; HP M404dw; HP M402 line has HP M402d, HP M402dne. Printer lines may have the same numeric code but the last letter symbol is different and will have different functions. So, what do the symbols dn, d, n, dw, dne on the printer mean? Read the article below for the answer.

These symbols that come after each machine code are to serve different needs of the user.
Code “d”
“d”: stands for Duplex. Printers with the code “d” have an automatic duplex printing function that saves time when printing 2-sided documents.
Code “n”
“n”: Abbreviation for Network. Printers with the code “n” have the function of connecting to LAN. This printer is suitable for offices with many computers that need to connect to the printer.
Code “dw”
“dw”: The word “w” stands for Wifi. Printers with the code “dw” have both 2-sided printing and wifi connectivity.
Code “dn” : Printer has double-sided printing function and can connect to LAN.
Code “dne”
“e” stands for HP ePrint. Printers marked “e” can print from mobile phones via HP’s printing app even when the printer is not connected to wifi. Printers marked “dne” can print on both sides, connect to LAN and print via mobile apps.
Hopefully through the above article you have been able to distinguish the functions of printers through the letters behind their code numbers.