All operations can be done through mobile. After starting the app on the mobile phones of all the employees of the library, the employees can do the planned and assigned work in the library.
Internet is necessary because software is based on the Internet and modern technology "cloud". This makes the work in the library centralized. Also the registered information is stored on "cloud" computer/server.
A printer is needed to take out the printed copy of the required information after the completion of the work in the library. Buying a WiFi-Laser printer is more convenient. A printer should be purchased after making sure that it can print directly from the mobile phone.