The IBM 738 was IBM's first

core memory Core or cores may refer to: Science and technology * Core (anatomy), everything except the appendages * Core (manufacturing), used in casting and molding * Core (optical fiber), the signal-carrying portion of an optical fiber * Core, the central ...

unit to use

transistor upright=1.4, gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink). A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch e ...

ized sense amplifier circuits. Designed in 1955 for the

IBM 704 The IBM 704 is a large digital mainframe computer introduced by IBM in 1954. It was the first mass-produced computer with hardware for floating-point arithmetic. The IBM 704 ''Manual of operation'' states: The type 704 Electronic Data-Pro ...

, it used

vacuum tube A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. The type kn ...

s for all other circuits, and provided a capacity of 32768 - 36-bit words. It was also used in the later

IBM 709 The IBM 709 was a computer system, initially announced by IBM in January 1957 and first installed during August 1958. The 709 was an improved version of its predecessor, the IBM 704, and was the third of the IBM 700/7000 series of scientific com ...

References

External links

''A 32,000-Word Magnetic-Core Memory'' by E. D. Foss, R. S. Partridge
Memory 0738

738 __NOTOC__ Year 738 ( DCCXXXVIII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 738 for this year has been used since the early medieval period, when the Anno Domini cale ...

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