The Zebra TC21 is an Android tablet that can run the Windward DataCollector Application from the Google Play store and upload data to Windward System Five.
You may require an update to System Five and possibly the Windward POS Device Manager.
The Windward Datacollector App is currently in Google Alpha preview. To be invited to participate, please send your account manager your google email address which is associated with your Zebra TC21. You can download the app from https://play.google.com/apps/internaltest/4700672995914150968