FACIT EDB

FACIT EDB was a vacuum tube based computer that was manufactured by Åtvidabergs industrier AB after the designs for BESK, that had been developed by the Swedish Board for Computing Machinery (Matematikmaskinnämnden).

FACIT EDB was the first fully Swedish series production computer. EDB stod for "Electronic Computer Processing". The manufacturing was done by Åtvidabergs Industrier department of electronics in and came to fruition by recruiting 18 key persons from the Swedish Board for Computing Machinery (Matematikmaskinnämndens). Internally nicknamed "the Besk boys". In 1960 the department became Facit Electronics with a new factory in Solna. The recruitment of people from Swedish Board for Computing Machinery were approved by the Finance minister Gunnar Sträng. That thought that production of computers was not something the government should be involved in. In 1963 an FACIT EDB-3 were installed at National Defence Radio Establishment (FRA) which enabled use at any time of the day.

In 1956 Åtvidabergs industrier recruited 17 people from the Swedish Board for Computing Machinery that had developed the BESK computer. The same year the company bought the designs drawings for BESK and the first copy were inaugurated in October 1957. It had some improvements, like the double amount of magnetic-core memory, later came a new advanced magnetic tape memory, the carousel memory.

FACIT EDB was installed as a service machine in Åtvidaberg industries facilities at Karlavägen in Stockholm. It meant that customers could come and run their own programs for payment per the hour. The machine became heavily used, the need for calculations existed among others in meteorology.

FACIT EDB were like the BESK computer a so called IAS machine. The original IAS-machine were completed at Massachusetts Institute of Technology (MIT) in 1951. FACIT EDB were programmed by loading a program into the working memory, were also in- and output data could be stored. IAS-machines weren't software compatible, but build on drawings of the original IAS-machine architecture.

...
Wikipedia