Visible file

A visible file or kardex (a generic trademark referring to a prominent purveyor) is a filing system for overlapping cards fixed in shallow drawers.

A version was commercialized by Kardex. The Library Bureau company commercialized the similar L. B. Speedac,[1] while yet another brand was the Index Visible System.

References
  1. The Magazine of Business 47:294 (1925)
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