Abstract: A system for electronic registration of air travel logbooks, wherein data input is performed by a person in two steps. The first step includes the input of data into a terminal and the correction of any errors. The second step includes the permainent storage and processing of the data in a computer. The permanent storing prevents subsequent changing of the input data, whereby the second step is performed only with access to the computer obtained by verification of conformity between the identity of the person and a password. Access to the computer is obtained by the person for the output of data regarding the person by using the password. An authority obtains access to data in the computer regarding a specific person by using a first code, and to data regarding a specific aircraft's flights by using a second code.