Which is my user's number and password as a member of the ULL?

It is the same number you usually use in other services of the ULL (virtual classroom, e-mail, "Sede Electrónica",...):

user: alu0000000000
password: NNNN1111 (four capital letters followed by 4 numbers)

What is my reader number and my password?

In order to identify yourself in the Library's services yo need to know your reader number (número de lector)and your password.
Your reader number is the 10-digit number shown below the barcode at the back of your ULL ID card.
Your password is your birthdate in the form DDMMYYY (e.g.., if you were born on 15 March 1998 yor password is 15031998)

How can I know my password?

Every student receive their password (clave de servicio) when they register. It allow students to access their personal data through the Student's Portal at the ULL website.
If you don't have this information, follow these instructions.