Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
Back in October 1956, my brother shot this Ektachrome slide to show the construction of the new Engineering Building at Cal Poly, and a student parking lot just happened to be in the foreground. Today it looks like a vintage car rally. For extra points: spot the Corvette. View full size.