Paper can have a variety of properties depending on the composition and technology used in its manufacture. At the same time, each application requires its own special requirements for the paper intended for these applications. This chapter discusses these requirements and provides advice on how to select papers with optimal properties for these specific applications, such as sensor applications, printing, electronic devices, and energy technologies. For this purpose, the possibilities of using all types of paper are considered and the criteria for their use in various devices are assessed. Features of the use of nanocellulose in these applications are also discussed.