The day of 7 May has entered the history of science and technology as the birthday of radio and communication.

It was on this day in 1895 at the meeting of the Russian Physical-Chemical Society that the Russian physicist Alexander Stepanovich Popov made a presentation and demonstration of his first radio receiver in the world, performing the first radio communication session.

In July 1897, Popov wrote to the newspaper "Novoye Vremya" that: "The discovery of the phenomena that served Marconi belongs to Hertz and Branly, then there is a series of applications started by Minchin, Lodz and many after them, including me, and Marconi had the courage to set himself on practical ground..."

The first irregular radio broadcasts in Russia were conducted from 1919 from the Nizhny Novgorod Radio Laboratory, and since 1920 from experienced radio broadcasting stations in Moscow, Kazan.

The formation and popularization of radio broadcasting in the country in the 1920s was facilitated by a mass amateur radio movement, which began to develop after the opening in 1922 in Moscow of the radio station named after Komintern. Regular radio broadcasting began on 23 November 1924, when the first issue of the radio newspaper was put on air.

Since 1929, regular radio broadcasts from Moscow to foreign countries began.

The official annual state holiday Radio Day became in 1945, at the fiftieth anniversary of the invention of radio, when, considering the role of radio in the cultural and political life of society and in the defense of the country, the government of the USSR adopted a corresponding resolution.

After the invention of the radio, on 9 April 1957, the Soviet radio engineer Kuprijanovich Leonid Ivanovich demonstrated the first portable mobile phone LK-1. It was a 3 kg device with a range of 20-30 km and could work without battery replacement for 20-30 hours. The patent for the invention was granted this year. A year later, a prototype weighing only 500 grams (LK-2) was created, and in 1961 a device weighing only 70 grams appeared, which Leonid Ivanovich called the radiophone (or LK-3).

Kuprijanović's mobile was connected to GTS via an automatic telephone radio station (ATP or base station). It was possible to call not only from the LK to any landline phone, but also make a callback from an ordinary city number or from a street vending machine to the LK.

Unfortunately, the mobile phone invented by Kuprijanovich in the USSR 16 years before that of the American engineer Martin Cooper (considered the world's first cellular phone), has not entered mass production and use. The reason is still unknown.

By the decree of the Presidium of the Supreme Soviet of the USSR dated 1 October 1980 "On festive and commemorative days" 7 May was included in the list of holidays, as "Day of radio, holiday of workers of all branches of communication".

The invention of radio marked the beginning of the development of information technology. It became the basis for the creation of radio systems, navigation systems, mobile communications, wireless data networks and the Internet.
The structured system for monitoring and managing building and construction engineering systems (SMIS) in accordance with GOST R 22.1.17-20.16 provides solutions for a sub-system of communication and management in crisis situations (SUKS), enhancing the efficiency of emergencyrescue, other emergency work (ASDNR) in the event of a threat and occurrence of emergencies, including those caused by a terrorist (criminal) act.