The need for paper is eliminated by using online systems, such as replacing index cards and rolodexes with databases, typed letters and faxes with email, and reference books with the internet. Another way to eliminate paper is to automate paper-based processes that rely on forms, applications and surveys to capture and share data. This method is referred to as "electronic forms" or e-forms and is typically accomplished by using existing print-perfect documents in electronic format to allow for prefilling of existing data, capturing data manually entered online by end-users, providing secure methods to submit form data to processing systems, and digitally signing the electronic documents without printing.