BESK (Binär Elektronisk SekvensKalkylator) was Swedens first computer. It was developed by Matematikmaskinnämnden[?] and during a short time it was the fastest computer in the world. The computer was completed in 1953. The technology behind BESK was later continued with FACIT EDB[?].
BESK was developed by Matematikmaskinnämnen at the same time as BARK.