A further development of the ideas was a machine called Super Robinson or Super Rob. Designed by Tommy Flowers, this one  had four bedsteads to allow for running four tapes and was used for running depths and "cribs" or known-plaintext attack runs.
Building upon these ideas resulted in the creation of a device called Super Robinson or Super Rob. Developed by Tommy Flowers, this machine had four platforms to support the simultaneous operation of four tapes and was employed for carrying out depths and "cribs" or known-plaintext attack runs.