Drum memory was a magnetic data storage device invented by Gustav Tauschek in 1932 in Austria.
Edsger Wybe Dijkstra (11 May 1930 – 6 August 2002) was a Dutch systems scientist, programmer, software engineer, science essayist, and early pioneer in computing science.
N.V. Electrologica was a pioneering Dutch computer manufacturer from 1956 to 1968, when it was taken over by Philips.
The Electrologica X1 was a digital computer designed and manufactured in the Netherlands from 1958 to 1965.
In computing, floating-point arithmetic is arithmetic using formulaic representation of real numbers as an approximation so as to support a trade-off between range and precision.
Magnetic-core memory was the predominant form of random-access computer memory for 20 years between about 1955 and 1975.
In computer science, a semaphore is a variable or abstract data type used to control access to a common resource by multiple processes in a concurrent system such as a multitasking operating system.
The THE multiprogramming system or THE OS was a computer operating system designed by a team led by Edsger W. Dijkstra, described in monographs in 1965-66 (Jun 14, 1965) and published in 1968.