Editing Sumlock ANITA calculator (section)

{{Short description|1961 all-electronic desktop calculator}}

{{More citations needed|date=September 2018}}

{{Use dmy dates|date=October 2017}}
[[File:AnitaMk8-01.jpg|right|thumb|275px|ANITA Mk VIII.]]

The '''ANITA''' Mark VII and '''ANITA''' Mark VIII [[calculator]]s were launched simultaneously in late 1961 as the world's first all-[[Electronics|electronic]] desktop [[calculator]]s.<ref name="officemag1961"/><ref name="BuromaschinenMechaniker1961"/> Designed and built by the [[Bell Punch|Bell Punch Co]]. in [[United Kingdom|Britain]], and marketed through its [[Sumlock Comptometer]] division, they used [[vacuum tube]]s and [[cold-cathode]] switching tubes in their [[logic circuit]]s and [[nixie tube]]s for their numerical displays.<ref>Keith Houston. ''Empire of the Sum: The rise and reign of the pocket calculator'' (2023)</ref>

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.