Computers plus collaboration equals connections. Then it automatically searches for data that might synch with yours. OGF's software, Genealogy Browser, can do this because it runs on the Internet.
Input is pretty straightforward.
You click on a person's box to prompt the details screen, where you add or edit data. You zoom in and out by sliding a bar above the screen. Your information becomes part of the mega-database, which tags all records by submitter. OGF looks for matches, narrowing down the possibilities by considering the relationships between the names in each pedigree. It's up to you and the other submitter to work out the difference or decide if the information synchs.