 The symbol appears to have been used primarily in handwritten material; in the printing business, the numero symbol (№) and barred-lb (℔) are used for "number" and "pounds" respectively.For mechanical devices, the symbol appeared on the keyboard of the Remington Standard typewriter (c. 1886), but was not used on the keyboards used for typesetting.It appeared in many of the early teleprinter codes and from there was copied to ASCII, which made it available on computers and thus caused many more uses to be found for the character.