Runtime are standalone and are not sharable. IWP will allow a user to connect with a web browser and Filemaker Go is free that can be used on an iPad, iPod, and iPhone. IWP and Go has limited abilities compared to the full version of Filemaker.
To add to S Chamblee's post. FileMaker Pro can be used to open the files and host them over the network. It can host up to 5 simultaneous users using their web browsers to connect to it if it is setup to publish the database using Instant Web Publishing (IWP).
Up to 9 iOS devices can use FM GO to connect to the same database as FM GO clients. And up to 9 users with Different registered copies of FileMaker Pro can connect to the same database. (The FM GO + FMP PRO user count must be 9 or fewer.)
To support connection by more users requires FileMaker Server or FileMaker Server Advanced (IWP requires Advanced). There are companies that will host your FileMaker database for you in exchange for a monthly fee.
Thank you for your replies to my question. I think I've found a way to solve my problem. I'm putting the database on a computer that has FMP and a public desktop. This way anyone who has access to this computer can input the shipment tracking information. This way I can avoid having to install FMP on everyone's computer (all Window's PC) and then everyone only uses one database.
Thanks for your help.
And what happens when two users try to use the database at the same time?