2/24/2018 S-1 Table of Contents Access and organize Search. Dropbox has powerful search capabilities that allow users to quickly find the files and folders they need. Our autocomplete technology surfaces and prioritizes content based on users’ previous activity. For Dropbox Professional subscribers and Dropbox Business teams, full text search allows users to scan the entire content of their files. Rich previews. Rich previews allow users to easily interact with files across any device without having to open different applications. Users can comment on, annotate, review, and present files, and see who viewed and edited them. We support previews of over 280 file types, and Dropbox users currently preview files tens of millions of times every day. 99 https://www.sec.gov/Archives/edgar/data/1467623/000119312518055809/d451946ds1.htm 107/235