'cache'=>'Generic cache table for caching things not separated out into their own tables. Contributed modules may also use this to store cached items.',
'cache_form'=>'Cache table for the form system to store recently built forms and their storage data, to be used in subsequent page requests.',
'cache_page'=>'Cache table used to store compressed pages for anonymous users, if page caching is enabled.',
'cache_menu'=>'Cache table for the menu system to store router information as well as generated link trees for various menu/page/user combinations.',