Let’s say you’re looking for a spreadsheet on your Apple computer. You may know the filename, but unfortunately the file name is a word or two that are very common and will show up in many different files.
You can search your computer for all spreadsheets by using Spotlight and typing kind:numbers (for example) to see a list of all Apple Numbers files on your computer. Below is a handy chart with some examples (click it to enlarge). To learn more, read “Create good queries in Spotlight.”