2/24/2018 S-1 Table of Contents Doc scanner. The doc scanner in our mobile app lets users create content in Dropbox from hard copies. This includes transforming everything from printed materials to whiteboard brainstorming sessions into digital documents that users can edit and share. We apply proprietary machine learning techniques to automatically detect the document being scanned, extract it from the background, fit it to a rectangular shape, remove shadows, adjust the contrast, and save it as a PDF or image file. For Dropbox Business teams, scanned content is analyzed using Optical Character Recognition so text within these scans is searchable in Dropbox. 98 https://www.sec.gov/Archives/edgar/data/1467623/000119312518055809/d451946ds1.htm 106/235