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Sumlock ANITA calculator

ANITA Mk VIII.

The ANITA Mark VII and ANITA Mark VIII calculators were launched simultaneously in late 1961 as the world's first all-electronic desktop calculators.[1][2] Designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock Comptometer division, they used vacuum tubes and cold-cathode switching tubes in their logic circuits and nixie tubes for their numerical displays.[3]

They were the first of a series of desktop and hand-held electronic calculators that the company was to develop and sell under the ANITA name into the mid-1970s.

  1. ^ Cite error: The named reference officemag1961 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference BuromaschinenMechaniker1961 was invoked but never defined (see the help page).
  3. ^ Keith Houston. Empire of the Sum: The rise and reign of the pocket calculator (2023)

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