By the early 20th century, directories became vital tools for administration and commerce.
The history of telephony in Kursk began in with the opening of the first city telephone exchange. In its first five years, the network was exclusive, serving only 88 subscribers with 101 telephone sets. Using a phone in this era was a physical task; the 1912 directory instructed users to "turn the handle with the right hand 2-3 times" to reach the operator. The Soviet Era: "All of Kursk" sotovyj spravochnik kurska
Справочник Курска - все адреса и телефоны города на карте By the early 20th century, directories became vital