EDGAR (Electronic Data Gathering, Analysis, and Retrieval) is the electronic system that collects, validates, indexes, and provides public access to the filings companies submit to the SEC.
The SEC provides free online public access to all of it's filings through the Next-Generation EDGAR System.
Options/screens for searching filings:
Simple Company Search: by Company Name or Ticker
Comprehensive Search: By Company, Filing type, Location, Industry code, etc.