To the right, you see how I made my Doc visible. I chose to not make it viewable to the entire world, but just to all 7,000+ AISD employees and 80,000+ students.
*WARNING: This is a good and bad thing. Don't share any confidential material like this as someone could search and find it by accident.
Now that my document is saved with some unique name and I marked the document as visible by all AISD searches, my colleagues can find this document and open it WITHOUT me having to share it with them specifically.
However, I can also search the vast amount of docs that live inside the AISD Google Docs domain. By using the advanced search drop-down, I can use the 'Search AISD' link at the very bottom. My search results now will come from my Docs as well as all other user-created docs in AISD.