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Type 53K/54K was [[introduced in 1955|introduced in March 1955]] along with the [[541]]/[[545]]. | Type 53K/54K was [[introduced in 1955|introduced in March 1955]] along with the [[541]]/[[545]]. | ||
At that time, it was the only plug-in that could utilize the | At that time, it was the only plug-in that could utilize the | ||
new mainframes' speed; the redesigned | new mainframes' speed; the redesigned [[A|Type A]], [[B|Type B]], and [[C|Type C]] | ||
weren't ready until August 1956. In August 1955, just five months | weren't ready until August 1956. In August 1955, just five months | ||
after introduction, it was renamed Type 53/54K, and, in 1959, | after introduction, it was renamed Type 53/54K, and, in 1959, | ||
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Type K was the fastest of the single-channel plug-ins. | Type K was the fastest of the single-channel plug-ins. | ||
Tek did not equal it until | Tek did not equal it until [[L|Type L]] in 1957, | ||
and did not exceed it until | and did not exceed it until [[1A1|Type 1A1]] in 1964. | ||
Earlier single-channel plug-ins had two inputs and a | Earlier single-channel plug-ins had two inputs and a | ||