Casio Databank (often styled as CASIO DATA BANK) is a series of digital watches and electronic personal organizers manufactured by Casio. The watches allow data storage for names and telephone numbers, memos, and in late editions, email addresses; in addition to usually providing a calculator as well as the standard features of a digital watch. The personal organizers allowed storage of names, telephones and fax numbers, memos and includes a "secret" storage area for memos which required a password to access.