school library management

 SLM stands for "school library management". It provides a web service
 useful for teams who lend school books to students. Here are some
 features:
 .
  - defining constants for the school, like name, logo, manager's name
  - creating a catalogue of available books
  - managing the inventory of books, each one identified by a unique barcode
  - importing lists of students, with their optional curricula
  - lending quickly a few books to every student, with the help of a
    barcode reader
  - managing the book returns, with the help of a barcode reader
  - replying to some request, like "whom is this book?", list of
    students which still owe books, list of students who have no book
    lended, and so on.
  - every web page comes with a contextual help