The core memory was backed by one or two magnetic drums with 16k words each.

"One or more magnetic drums are available as optional equipment with a capacity of 60,000 characters each."

This system, like Ultronics', made use of magnetic drums.

Historically, early computers used delay lines, Williams tubes, or rotating magnetic drums as primary storage.

Its basic design was magnetic drums connected via relays, with a voting method of memory error detection.

A consequence of this design was that, unlike other computers with magnetic drums, the G-15 did not retain its memory when it was shut off.

The Mark III used nine magnetic drums (one of the first computers to do so).

Like all early main-frame systems, this batch-oriented system managed magnetic drums, disks, card readers and line printers.

This was called the Electromechanical Reservisor which comprised a temporary storage of magnetic drums.

Other components that were used previously are magnetic tapes, magnetic drums, magnetic bubble memory etc.

Early storage devices such as delay lines, punched cards, paper tape, magnetic tape, and magnetic drums were used instead.

One spin off effect from the BESK works is still the design of the magnetic Drum memory.

The spin would force the grains of crushed ore through a series of sorting screens, and the sorted material dropped onto rotating magnetic drums.

As the names imply, both systems relied on the comparison of returned signals stored on magnetic drums, then the only high-speed storage systems available.

The vehicle also features transverse gearing, independent suspension and magnetic drums that provide powerful control braking by means of electromagnetically generated opposing magnetic fields.

The first automatic intercept systems used rotating magnetic drums containing multiple recorded phrases, with a computer or mechanical control system playing phrases in the proper sequence.

The first DDA built was the Magnetic Drum Digital Differential Analyzer of 1950.

Spinning magnetic drums and tiny bulbs flashing GO-GO-GO-GO.

By June 1963 the Time-Sharing System (TSS) Model Zero was demonstrated after magnetic drums were added to the time-sharing.

MADDIDA (Magnetic Drum Digital Differential Analyzer)

In 1953 Hurd convinced IBM management to develop what became the IBM 650 Magnetic Drum Data Processing Machine.

The Magnetic Drum Digital Differential Analyzer (MADDIDA) was a computer built by Northrop Aircraft Corporation in 1950.

His system used a digital computer to read ticker data and track the additional data on a magnetic drum storage unit, also transmitting the data to other magnetic drums in major cities.

Francis E. Hamilton is believed to be the first IBM Fellow, appointed in 1963 for amongst other things his work on the development of the 650 Magnetic Drum Data Processing Machine.

"The 650 RAMAC combines the IBM 650 Magnetic Drum Data Processing Machine with a series of disk memory units which are capable of storing a total of 24-million digits.