Cardboard box for punch cards. The new cards were sold in these boxes. These boxes were also used to store the punch cards of the programs. The long programs with some thousands of lines of code needed the same number of punched cards. They had to be put in the card reader in the right sort order.
<a href="//commons.wikimedia.org/wiki/User:Tangopaso" title="User:Tangopaso">Tangopaso</a>
1975
Personal collection