78s were the first type of standardized phonographs. They were 10″ in diameter and held one song on each side. They were replaced by 33 1/3 and 45 records. Many 78s have been digitized
The history of 78 RPM recordings
How The Great 78 Project is saving half a million songs from obscurity
The Great 78 Project – over 300,000 recordings have been digitized
Sad! 