Remembering ARRA

The ARRA (for “Automatische Relais Rekenmachine Amsterdam”, Automatic Relay Calculator Amsterdam) was the first Dutch computer, and was built from relays for the Dutch Mathematical Centre (Dutch: Mathematisch Centrum), which later became the Centrum Wiskunde & Informatica (CWI).
(From wikipedia: )

1953 “Functionele beschrijving van de arra”
Edsger W. Dijkstra:

(Before this: Electrologica X1 Computer )

To Prof Dr Adriaan. van Wijngaarden:

Exciting Video:
Remembering ARRA: A pioneer in Dutch computing (English)

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