What was the first calculator called?
That would be an Abacus.
Depends if you mean the electronic calculator or not? Before we had calculators we had slide rulers. In 1632, the circular and rectangular sliderule was invented by W. Oughtred. William Seward Burroughs invented the first practical adding and listing machine. Burroughs submitted a patent application in 1885 for his 'Calculating Machine' and the patent was awarded in 1888.
The first calculator dates back to 2700 BC with the invention of the Abacus, invented in Mesopotamia. In the 1940's and 1950's, the first mainframe computers were invented, which led towards the hand-held calculators we know today. In the mid-1960's, desktop calculators were coming to fruition, and in 1970, the first "Pocket" calculator was invented in Japan by Sanyo, called the ICC 0081.
Blaise Pascal worked on the calculator for three years between 1642 and 1645. This calculator, called the Pascaline, was like a mechanical calculator of the 1940s. He created it to help his father with tax collecting. However, the first calculators were abaci, and were often constructed as a wooden frame with beads sliding on wires. Abacuses were used centuries before the adoption of the written Arabic numerals system and are still used by some merchants…
The calculator was designed based on the use of many pre-electronic models, such as the Abacus which can be traced back to 2700 BC, and the Mechanical Calculator (designed by Wilhelm Schickard) in the early 1600s. In 1957 the Casio Computer Company created the first electronic calculator, out of Japan.