In Spotlight, you can set what types of items you want to be indexed and searchable. Most of the options are fairly straightforward: "Contacts" searches your contacts, "Images" for images, and so on. However, there are two options that I don't understand: "Other" and "Developer".
The Search Results panel is rather fine grained. Why is there, what I'm guessing to be, a catch all option with "Other" and what does it catch? Similarly, what does the "Developer" option index?
I looked in the "Spotlight preferences" page of the "Mac Help", but from what I can tell, it doesn't detail it. In fact the "Narrow the scope of your searches" topic details everything but those two options under the "Search by the type of items" section:
Type of item Keyword ----------------------------------------- Apps kind:application kind:applications kind:app Contacts kind:contact kind:contacts Folders kind:folder kind:folders Email kind:email kind:emails kind:mail message kind:mail messages Calendar events kind:event kind:events Reminders kind:reminder kind:reminders Images kind:image kind:images Movies kind:movie kind:movies Music kind:music Audio kind:audio PDF kind:pdf kind:pdfs Preferences kind:system preferences kind:preferences Bookmarks kind:bookmark kind:bookmarks Fonts kind:font kind:fonts Presentations kind:presentation kind:presentations