The evolution of the calculator has gone a long way from the oldest calculator which is the abacus and from the one that we are using now the electronic calculators. Now it is much easier to do computation and calculations with the use of electronic calculators.
During the 40’s to 50’s and also 60’s the calculators during this time are complicated and it is a motor mechanical machines that adds up with no electronic part on it.
It was around 1961 where in the first electronic desktop calculator in the world was introduced by Bell Punch Co., for European market continent this was the Anita MkVII and for other markets the Anita Mk 8.
In 1963 to 1964 the first commercial transistor desktop calculators was developed; Friden EC130 & EC132, Mathatron, IME 84, Sharp CS10A. The prices of these calculators can be compared to a family car.
Texas Instruments develop of hand held electronic computers which is called Cal-Tech around 1965.
It was during 1969 that the first battery powered hand held electronic calculator was developed the Sharp QT-8B. Sharp QT-8D was the first calculator that uses Large Scale Integration or LSI chips that has ICs by Rockwell. This is also where the green fluorescent tube displays was introduced.
In 1970 there were many first, first hand held a calculator was released like Canon Pocketronic, Sanyo ICC-0081, Sharp EL-8. Busicom Junior first use of calculator chips, Busicom LE-120A first shirt pocket sized and also that use LED.
Along the way there were more evolution happened from 1971 up to now. Aside from battery operated calculators there are also calculators that are now powered by solar and calculators can be now the size of an id or a credit card.
As time goes by ad as the technology becomes more advance we cannot tell what will happen next or how calculators will look like in the future.