In each school zip folder, you will find three folders*: Horizontal, Vertical, and Mascot Isolated. Within each folder are black and white and color files in various formats.
Here's a key to the formats.
PDF: vector art, high resolution, print and production. Can be enlarged.
PNG: will place in Microsoft Office files (Word, Powerpoint, Excel) and workable for Web. DO NOT ENLARGE png files, they will degrade. If you need larger png files they can be made from the .ai or .pdf vector formats.
AI: These are Adobe Illustrator native files. They are appropriate for use with high-end graphics, print and signage. Your standard Office programs will not be able to open these files. Your Webmaster will be able to manipulate these so he'll probably like them best.
*Please take note: Schools with an official logo before July 2015 will have different files in their zip folders.