"Reckoner" is a song by the English rock band Radiohead, released on their seventh album, In Rainbows (2007). It was produced by Nigel Godrich and developed...

The Reckoners is a series of young adult superhero novels written by American author Brandon Sanderson. The series consists of Steelheart (2013), Firefight...

A ready reckoner is a printed book or table containing pre-calculated values, often multiples of given amounts. They were widely used in shops and by tradesmen...

The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673...

The Sand Reckoner (Greek: Ψαμμίτης, Psammites) is a work by Archimedes, an Ancient Greek mathematician of the 3rd century BC, in which he set out to determine...

Archimedes lived for 75 years before his death in 212 BC. In the Sand-Reckoner, Archimedes gives his father's name as Phidias, an astronomer about whom...

been lost, but a reference in a book by Archimedes, entitled The Sand Reckoner (Archimedis Syracusani Arenarius & Dimensio Circuli), describes a work...

The Reckoner Trilogy is a young adult, fantasy book series written by David Robertson, published October 10, 2017 by HighWater Press. The series includes...

device that could add and subtract, selling around 50 models. The stepped reckoner was invented by Gottfried Leibniz by 1676, which could also divide and...

mid-1970s. Gottfried Wilhelm Leibniz built a machine called the stepped reckoner based on the design of the stepped drum in 1694. It was made famous by...