If you are a bit stuck finding a list of categories that your app can be placed in when deploying your Blackberry Playbook app then this list of Playbook app categories may help:
core.all – All
core.downloads – Downloads
core.internet – Internet
core.games – Games
core.utils – Utilities
core.ent – Entertainment
core.social – Social Networking
core.prod – Productivity
core.life – Lifestyle
core.ref – Reference
core.travel – Travel
core.news – News
core.photo – Photography
core.business – Business
core.edu – Education
core.books – Books
core.medical – Medical
core.media – Media
core.flash – Flash Apps
core.graphics – Graphics
To change your apps category, edit your blackberry-tablet.xml file and change the section <category>core.games</category> replacing “core.games” or whatever is there to one of the above