BARK

BARK

BARK ("Binär Aritmetisk Relä-Kalkylator", Swedish for "Binary Arithmetic Relay Calculator") was an early electromechanical computer. BARK was built using standard phone relays, implementing a 32-bit binary machine and could perform addition in 150 ms and multiplication in 250 ms. It had a memory with 50 registers and 100 constants. It was later expanded to double the memory. Howard Aiken stated in reference to BARK "This is the first computer I have seen outside Harvard that actually works."

BARK was developed by Matematikmaskinnämnen a few years before BESK. The machine was built with 8000 standard phone relays, 80 km of cable and with 175,000 soldering points. It was completed in February 1950 at a cost of 400.000 Swedish kronor, became operational on April 28, and was taken offline on September 22 1954. The engineers on the team led by Conny Palm were Harry Freese, Gösta Neovius, Olle Karlqvist, Carl-Erik Fröberg, G. Kellberg, Björn Lind, Arne Lindberger, P. Petersson and M. Wallmark.

External links

* http://www.algonet.se/~rittsel/dator/bark1.htm
* [http://www.treinno.se/pers/okq/index.htm Tekn. lic. Olle Karlqvist in memoriam] , memorial site of one of the engineers behind BARK and BESK


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  • Bark — Bark, also known as periderm, is the outermost layer of stems and roots of woody plants such as trees. It overlays the wood and consists of three layers, the cork or phellem, the phelloderm and the cork cambium or phellogen. Products used by… …   Wikipedia

  • BARK — bezeichnet: einen Schiffstyp, siehe Bark (Schiff) einen Hersteller von Einbaumotoren für Motorräder, siehe Bark (Einbaumotoren) in der Psychoakustik ein Maß für die Tonhöhenempfindung, siehe Bark Skala die Gemeinde Bark im Kreis Segeberg in… …   Deutsch Wikipedia

  • Bark — bezeichnet: einen Schiffstyp, siehe Bark (Schiffstyp) einen Hersteller von Einbaumotoren für Motorräder, siehe Bark (Einbaumotoren) in der Psychoakustik ein Maß für die Tonhöhenempfindung, siehe Bark Skala die Gemeinde Bark im Kreis Segeberg in… …   Deutsch Wikipedia

  • bark — bark; bark·hau·sen; bark·less; bark·ly·ite; bark·om·e·ter; bark·stone; em·bark; em·bark·ment; man·bark·lak; bark·en; bark·er; de·bark; man·bark·lac; …   English syllables

  • bark — bark1 [bärk] n. [ME < ON bǫrkr, akin to MLowG borke] 1. the outside covering of the stems and roots of trees and woody plants 2. some kinds of this matter used in tanning, dyeing, etc. 3. CINCHONA vt. 1. to treat with a bark infusion, as in… …   English World dictionary

  • Bark — Bark, v. t. [imp. & p. p. {Barked} (?); p. pr. & vb. n. {Barking}.] 1. To strip the bark from; to peel. [1913 Webster] 2. To abrade or rub off any outer covering from; as to bark one s heel. [1913 Webster] 3. To girdle. See {Girdle}, v. t., 3.… …   The Collaborative International Dictionary of English

  • bark — Ⅰ. bark [1] ► NOUN ▪ the sharp explosive cry of a dog, fox, or seal. ► VERB 1) give a bark. 2) utter (a command or question) abruptly or aggressively. ● one s bark is worse than one s bite Cf. ↑ …   English terms dictionary

  • bark|y — «BAHR kee», adjective, bark|i|er, bark|i|est. 1. consisting of or covered with bark. 2. of the nature of bark …   Useful english dictionary

  • bark — vb Bark, bay, howl, growl, snarl, yelp, yap mean to make the sound of or a sound suggestive of a dog. Bark implies the sharp, explosive utterance characteristic of dogs; it may be used not only of them and of another animal (as a seal) that… …   New Dictionary of Synonyms

  • bark — [n1] plant covering case, casing, coat, cortex, crust, husk, peeling, rind, shell, skin; concept 428 bark [n2] animal yelp bay, growl, grunt, howl, roar, snarl, woof, yap, yip; concept 64 bark [v1] yelp arf, bay, cry, gnarl, growl, howl, snap …   New thesaurus

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