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.
My father in his store, the De Luxe Groceteria, at 494 14th St. in San Francisco, sometime during WWII. This was a neighborhood grocery, but similar in size to the Skaggs Safeway stores he worked in and later managed in San Francisco during the 1920s-1930s. Here's a photo just after he opened in 1934. View full size.