The offices of the Central Social Institution of Prague, Czechoslovakia 26th April 1937.
- the largest vertical letter file in the world. Here there is information stored on virtually every Czech citizen. The office building, which is considered architecturally unique, was made famous in a Czech film by JA Holman Rukavička.
The office consists of cabinets arranged from floor to ceiling tiers covering over 4000 square feet containing over 3000 drawers 10 feet long. It has electric operated elevator desks which rise, fall and move left or right at the push of a button, to stop just before drawer desired. The drawers also open and close electronically. Thus work which formerly taxed 400 workers is done by 20 with a minimum of effort. - Science Vibe