One of the most common Google privacy concerns among those who have studied Google's capabilities is that it can find individual file types, especially PDF files. That said, most people have never realized the full extent of that power, or they haven't discovered the number of different types of files available for searching. Using a file type modifier on Google for each search can be a bit tedious, so we went ahead and set up separate search engines for each of these file types, and even created search engines that combine file types into groups. For example, instead of searching only XLSX and CSV files in different engines, you can use "Spreadsheet Search Engine" to search in conjunction with other spreadsheet file types.