The sustainability of the development of electron beam technologies for production of components of electronic industry and communication devices based on high-voltage glow discharge electron guns since the middle of the XIX century till today is considered in this chapter. The history of development of high-voltage glow-discharge electron guns, including the first experiments in the XIX century, is considered. Pointed out that today the main advantages of applying high voltage glow discharge electron guns for the production of components of the electronic industry are the simplicity of their construction, relative cheapness, possibility of operation with different gases, as well as the possibility of effective control of beam power. As technological processes, which can be successfully realized with the application of such electron guns, capsulation of electronics components by precision welding and deposition of ceramic coatings are considered. Basic schemes of electrode systems of such electron guns are given. Advanced methods of computer simulation of electric field distribution in the discharge gap and calculation of trajectories of ions and electrons are also considered. Pointed out is that sustainability of electron beam technologies based on high-voltage glow discharge electron guns gives the positive impulse to further development of the electronic industry, and, on the contrary, applying new kinds of digital and programmable electronic devices in control systems of electron beam installations is necessary for stable development of such technologies and their application in the production of modern communication electronic devices, including communication devices and devices for smart homes and IoT.