An autograph book is a booklet or notebook used to collect and save personal signatures. It usually contains blank pages or lines for people to sign. Signature books are often used in various occasions, such as weddings, commemorative activities, conferences and so on. It can be used as a souvenir and can also prove the identity of the participants. For different activities, the design and use of autograph books may be different. People can write down their names, dates and personal wishes to show their participation and support. The signature book can also be an electronic version, which is signed by digital equipment. Such an autograph book can be saved and shared more conveniently.