. The Bell System technical journal . Fig. 17 — Magnetic drum. 1008 THE BELL SYSTEM TECHNICAL JOURNAL, SEPTEMBER 1956. Fig. 18 — Magnetic core array (Courtesy of IBM). One way in which electronic memory for various system applicationsmay be evaluated is given by the chart of Fig. 22. This chart attempts toshow, for the various forms of storage, the relation between the ca-pacity in bits and cycle time, which includes access, reading and, ifnecessary, the regeneration time of the stored information. For sake ofsimplicity, ferroelectric and magnetic core memories have been com-bined as coordinat
. The Bell System technical journal . Fig. 17 — Magnetic drum. 1008 THE BELL SYSTEM TECHNICAL JOURNAL, SEPTEMBER 1956. Fig. 18 — Magnetic core array (Courtesy of IBM). One way in which electronic memory for various system applicationsmay be evaluated is given by the chart of Fig. 22. This chart attempts toshow, for the various forms of storage, the relation between the ca-pacity in bits and cycle time, which includes access, reading and, ifnecessary, the regeneration time of the stored information. For sake ofsimplicity, ferroelectric and magnetic core memories have been com-bined as coordinate access arrays. Single bit electronic memory will bedescribed in more detail later. ELECTRONICS IN TELEPHONE SWITCHING SYSTEMS 1009 In the control portion of a switching system it is not only necessaryto gather and store information but it must be interpreted and appro-priate action taken. This function is called processing. Processingcircuits control the information gathering and storage functions andperform logical functions to produce the necessary flow of the logic circuits of electronic sys
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